OCR A level Physics: Energy Levels in Atoms

OCR A level Physics: Stars

OCR A level Physics: Chapter 19 Stars is apart of the Module 5: Newtonian world and Astrophysics. All presentations come with worked examples, solutions and homeworks. 19.1 Objects in the Universe 19.2 Life Cycles of Stars 19.3 Hertzsprung-Russell Diagram 19.4 Energy Levels in Atoms 19.5 Spectra 19.6 Analysing Starlight 19.7 Stellar Luminosity * The size of astronomical objects: Universe, Galaxies, Solar systems, Stars, Planets, Planetary satellites, Comets, Artificial planetary satellites * Comparing planets and comets * The birth of stars * Stars in equilibrium during the main sequence * Calculating mass in kg from solar mass * Life cycle of stars with a mass between 0.5 and 10 solar masses * Life cycle of stars with a mass above 10 solar masses * Pauli exclusion principle and electron degeneracy pressure * Red giants and white dwarfs * The Chandrasekhar limit * Red supergiants to black holes and neutron stars * Stellar nucleosynthesis * Definition of luminosity * Usual axis choice of a HR diagram. * Identifying the positions of the main sequence, white dwarfs, red giants, and red supergiants. * Description of how stellar evolution is shown in a Hertzsprung-Russell diagram * Atoms have different electron arrangements * Ground state energy * Bound electron states being negative * Converting between joules and electronvolts * Calculating the change of energy between energy states * Calculating a photon’s frequency and wavelength * The electromagnetic spectrum and wavelengths * Definition of spectroscopy * Electrons and energy levels * Continuous spectra * Emission spectra from gases * Absorption spectra from gases * Electromagnetic interference * Double slit experiment * Path and phase difference * Diffraction grating * The grating equation * Lines per millimeter to grating spacing * Maximum order, n * Maximum number of maxima * The electromagnetic spectrum, frequency/wavelength, and temperature * Black body radiation * Wein’s displacements law * Stefan’s law (Stefan-Boltzmann law)