This resource is a complete lesson that covers The Planck Constant for the OCR A Level Physics A course. However, it is useful for other exam boards too. This lesson teaches the following content: -using LEDs and the equation eV = hc / λ to estimate the value of Planck constant h -determine the Planck constant using different coloured LEDs. This lesson includes: -A full presentation including 2 example questions with worked solutions. -A worksheet with model answers, perfect to set as homework. -Clear visual aids and diagrams to simplify complex concepts. -Editable PowerPoint and Word document for easy customisation. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

This resource is a complete lesson that covers The Photoelectric Effect for the OCR A Level Physics A course. However, it is useful for other exam boards too. This lesson teaches the following content: -photoelectric effect, including a simple experiment to demonstrate this effect -demonstration of the photoelectric effect using, e.g. gold-leaf electroscope and zinc plate -a one-to-one interaction between a photon and a surface electron -Einstein’s photoelectric equation hf = 𝜙 + KEmax -work function; threshold frequency -the idea that the maximum kinetic energy of the photoelectrons is independent of the intensity of the incident radiation -the idea that rate of emission of photoelectrons above the threshold frequency is directly proportional to the intensity of the incident radiation. This lesson includes: -A full presentation including 3 example questions with worked solutions. -A worksheet with model answers, perfect to set as homework. -Clear visual aids and diagrams to simplify complex concepts. -Editable PowerPoint and Word document for easy customisation. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

This resource is a complete lesson that covers Wave-Particle Duality for the OCR A Level Physics A course. However, it is useful for other exam boards too. This lesson teaches the following content: -electron diffraction, including experimental evidence of this effect -diffraction of electrons travelling through a thin slice of polycrystalline graphite by the atoms of graphite and the spacing between the atoms -the de Broglie equation λ = h / p . This lesson includes: -A full presentation including 3 example questions with worked solutions. -A worksheet with model answers, perfect to set as homework. -Clear visual aids and diagrams to simplify complex concepts. -Editable PowerPoint and Word document for easy customisation. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

This resource is a complete lesson that covers Superposition & Interference for the OCR A Level Physics A course. However, it is useful for other exam boards too. This lesson teaches the following content: -the principle of superposition of waves -graphical methods to illustrate the principle of superposition -interference, phase difference and coherence -describing constructive and destructive interference in terms of phase difference This lesson includes: -A full presentation including 2 example questions with worked solutions. -A worksheet with model answers, perfect to set as homework. -Clear visual aids and diagrams to simplify complex concepts. -Editable PowerPoint and Word document for easy customisation. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

This resource is a complete lesson that covers The Photon Model for the OCR A Level Physics A course. However, it is useful for other exam boards too. This lesson teaches the following content: -the particulate nature (photon model) of electromagnetic radiation -photon as a quantum of energy of electromagnetic radiation -energy of a photon; E = hf and E = hc / λ -the electronvolt (eV) as a unit of energy This lesson includes: -A full presentation including 3 example questions with worked solutions. -A worksheet with model answers, perfect to set as homework. -Clear visual aids and diagrams to simplify complex concepts. -Editable PowerPoint and Word document for easy customisation. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

This resource is a complete lesson that covers Diffraction for the OCR A Level Physics A course. However, it is useful for other exam boards too. This lesson teaches the following content: -diffraction for all waves, including light -techniques and procedures to demonstrate diffraction using a ripple tank This lesson includes: -A full presentation including an example question with a worked solution. -A worksheet with model answers, perfect to set as homework. -Clear visual aids and diagrams to simplify complex concepts. -Editable PowerPoint and Word document for easy customisation. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

This resource is a complete lesson that covers Stationary Waves for the OCR A Level Physics A course. However, it is useful for other exam boards too. This lesson teaches the following content: -stationary (standing) waves using microwaves, stretched strings and air columns -graphical representations of a stationary wave -similarities and the differences between stationary and progressive waves -nodes and antinodes -stationary wave patterns for a stretched string and air columns in closed and open tubes -techniques and procedures used to determine the speed of sound in air by formation of stationary waves in a resonance tube -the idea that the separation between adjacent nodes (or antinodes) is equal to λ/2, where λ is the wavelength of the progressive wave -fundamental mode of vibration (1st harmonic); harmonics. This lesson includes: -A full presentation including 3 example questions with worked solutions. -A worksheet with model answers, perfect to set as homework. -Clear visual aids and diagrams to simplify complex concepts. -Editable PowerPoint and Word document for easy customisation. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

This resource is a complete lesson that covers Young’s Double-Slit Experiment for the OCR A Level Physics A course. However, it is useful for other exam boards too. This lesson teaches the following content: -techniques and procedures used for superposition experiments involving light -Young’s double-slit experiment using visible light -λ = ax / D for all waves where a << D -techniques and procedures used to determine the wavelength of light using a double-slit This lesson includes: -A full presentation including 2 example questions with worked solutions. -A worksheet with model answers, perfect to set as homework. -Clear visual aids and diagrams to simplify complex concepts. -Editable PowerPoint and Word document for easy customisation. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

This resource is a complete lesson that covers Two-Source Interference for the OCR A Level Physics A course. However, it is useful for other exam boards too. This lesson teaches the following content: -path difference -constructive and destructive interference in terms of path difference -two-source interference with sound and microwaves -techniques and procedures used for superposition experiments using sound, light and microwaves This lesson includes: -A full presentation including 2 example questions with worked solutions. -A worksheet with model answers, perfect to set as homework. -Clear visual aids and diagrams to simplify complex concepts. -Editable PowerPoint and Word document for easy customisation. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

This resource is a complete lesson that covers Diffraction Gratings for the OCR A Level Physics A course. However, it is useful for other exam boards too. This lesson teaches the following content: -techniques and procedures used to determine the wavelength of light using a diffraction grating -interference with a diffraction grating -mathematical analysis of interference involving diffraction gratings: θ ≈ x/D and d sinθ = n λ -the diffraction of white light This lesson includes: -A full presentation including 2 example questions with worked solutions. -A worksheet with model answers, perfect to set as homework. -Clear visual aids and diagrams to simplify complex concepts. -Editable PowerPoint and Word document for easy customisation. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

This resource includes 5 free complete lessons that cover the topic Forces in Action for the OCR A Level Physics A course. Although this resource is designed for the OCR A specification, the content covered is suitable for other exam boards too. Lessons Included: -Mass, Weight & Force Basics -Net Forces & Equilibrium -Moments & Torques -Drag & Terminal Velocity -Density, Pressure & Upthrust

A Level Physics worksheet containing questions about the lesson: The Big Bang Theory Model Answers Included This worksheet covers the following content: -the cosmological principle; universe is homogeneous, isotropic and the laws of physics are universal -Doppler effect; Doppler shift of electromagnetic radiation -Doppler equation: Δλ/λ ≈ Δf/f ≈ v/c for a source of electromagnetic radiation moving relative to an observer -Hubble’s law; v ≈ H0 d for receding galaxies, where H0 is the Hubble constant -model of an expanding universe supported by galactic red shift -Hubble constant H0 in both km s–1 Mpc–1 and s–1 units -the Big Bang theory -experimental evidence for the Big Bang theory from microwave background radiation at a temperature of 2.7 K This is tailored for the OCR A specification, however, the versatile nature of this resource makes it suitable for other exam boards too. This resource is designed to help students apply their knowledge to questions. This active revision technique ensures that the worksheet will be very useful for students, and will act as a vital revision tool. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

A Level Physics worksheet containing questions about the lesson: Universe Evolution Model Answers Included This worksheet covers the following content: -estimation for the age of the universe; t ≈ 1/H0 -evolution of the universe after the Big Bang to the present -current ideas; universe is made up of dark energy, dark matter, and a small percentage of ordinary matter. This is tailored for the OCR A specification, however, the versatile nature of this resource makes it suitable for other exam boards too. This resource is designed to help students apply their knowledge to questions. This active revision technique ensures that the worksheet will be very useful for students, and will act as a vital revision tool. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

A Level Physics worksheet containing questions about the lesson: Stellar Radiation & Luminosity Model Answers Included This worksheet covers the following content: -use of Wien’s displacement law λmax ∝ 1/T to estimate the peak surface temperature (of a star) -luminosity L of a star; Stefan’s law L = 4πr²σT⁴ where σ is the Stefan constant -use of Wien’s displacement law and Stefan’s law to estimate the radius of a star. -Hertzsprung–Russell (HR) diagram as luminosity-temperature plot; main sequence; red giants; super red giants; white dwarfs. This is tailored for the OCR A specification, however, the versatile nature of this resource makes it suitable for other exam boards too. This resource is designed to help students apply their knowledge to questions. This active revision technique ensures that the worksheet will be very useful for students, and will act as a vital revision tool. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

A Level Physics worksheet containing questions about the lesson: Stellar Spectra Model Answers Included This worksheet covers the following content: -energy levels of electrons in isolated gas atoms -the idea that energy levels have negative values -emission spectral lines from hot gases in terms of emission of photons and transition of electrons between discrete energy levels -the equations hf = ΔE and hc/λ = ΔE -continuous spectrum, emission line spectrum and absorption line spectrum -transmission diffraction grating used to determine the wavelength of light -the condition for maxima: dsinθ = nλ, where d is the grating spacing -different atoms have different spectral lines which can be used to identify elements within stars This is tailored for the OCR A specification, however, the versatile nature of this resource makes it suitable for other exam boards too. This resource is designed to help students apply their knowledge to questions. This active revision technique ensures that the worksheet will be very useful for students, and will act as a vital revision tool. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

A Level Physics worksheet containing questions about the lesson: Gravitational Field Strength Model Answers Included This worksheet covers the following content: -gravitational field strength; g = F/m -gravitational field strength g = -(GM) / r² for a point mass (inverse square law) -gravitational field strength is uniform close to the surface of the Earth and numerically equal to the acceleration of free fall. This is tailored for the OCR A specification, however, the versatile nature of this resource makes it suitable for other exam boards too. This resource is designed to help students apply their knowledge to questions. This active revision technique ensures that the worksheet will be very useful for students, and will act as a vital revision tool. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

A Level Physics worksheet containing questions about the lesson: Stellar Evolution (Life Cycle of Stars) Model Answers Included This worksheet covers the following content: -formation of a star from interstellar dust and gas in terms of gravitational collapse, fusion of hydrogen into helium, radiation and gas pressure -evolution of a low-mass star like our Sun into a red giant and white dwarf; planetary nebula -characteristics of a white dwarf; electron degeneracy pressure; Chandrasekhar limit -evolution of a massive star into a red super giant and then either a neutron star or black hole via a supernova -characteristics of a neutron star and a black hole This is tailored for the OCR A specification, however, the versatile nature of this resource makes it suitable for other exam boards too. This resource is designed to help students apply their knowledge to questions. This active revision technique ensures that the worksheet will be very useful for students, and will act as a vital revision tool. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

A Level Physics worksheet containing questions about the lesson: Astronomical Distances Model Answers Included This worksheet covers the following content: -distances measured in light-years (ly) and parsecs (pc) -stellar parallax and how it can be used to find distances in parsecs (pc) -the equation p = 1/d, where p is the parallax in seconds of arc and d is the distance in parsecs This is tailored for the OCR A specification, however, the versatile nature of this resource makes it suitable for other exam boards too. This resource is designed to help students apply their knowledge to questions. This active revision technique ensures that the worksheet will be very useful for students, and will act as a vital revision tool. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

A Level Physics worksheet containing questions about the lesson: The Solar System Model Answers Included This worksheet covers the following content: -the terms planets, planetary satellites, comets, solar systems, galaxies and the universe -distances measured in astronomical unit (AU) This is tailored for the OCR A specification, however, the versatile nature of this resource makes it suitable for other exam boards too. This resource is designed to help students apply their knowledge to questions. This active revision technique ensures that the worksheet will be very useful for students, and will act as a vital revision tool. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.

A Level Physics worksheet containing questions about the lesson: Planetary Motion Model Answers Included This worksheet covers the following content: -Kepler’s three laws of planetary motion -the centripetal force on a planet is provided by the gravitational force between it and the Sun -the equation T² = (4π²/GM)r³ (T² ∝ r ³) including derivation from first principles -geostationary orbit; uses of geostationary satellites This is tailored for the OCR A specification, however, the versatile nature of this resource makes it suitable for other exam boards too. This resource is designed to help students apply their knowledge to questions. This active revision technique ensures that the worksheet will be very useful for students, and will act as a vital revision tool. Click on the links below to check out our FREE A Level Physics resources: Mass, Weight & Force Basics Lesson Net Forces & Equilibrium Lesson Moments & Torques Lesson Drag & Terminal Velocity Lesson Density, Pressure & Upthrust Lesson We really appreciate feedback on our resources so if you kindly leave a review down below, you will be able to claim any resource (up to the value of this resource) from our shop for FREE. Just email resourcify321@gmail.com with your username and your chosen resource. Your chosen resource will be sent to you within 24 hours.