This presentation cover the OCR Gateway Physics 9-1 P5.2.2 Uses and Dangers of EM radiation. PowerPoint includes student activities with full worked answers.
- Recall that light is an electromagnetic wave
- Give examples of some practical uses of electromagnetic waves in the radio, micro-wave, infra-red, visible, ultraviolet, X-ray and gamma-ray regions
- Describe how ultra-violet waves, X-rays and gamma rays can have hazardous effects, notably on human bodily tissues.
- Explain that electromagnetic waves transfer energy from source to absorber to include examples from a range of electromagnetic waves
- Precautions for ultra-violet waves, X-rays and gamma rays
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GCSE OCR Physics P5 Waves
Resources for P5 GCSE OCR Physics Gateway 9-1 Triple and Combined (Higher and Foundation) is covered in this material. Each lesson includes student activities and full worked answers. * Definition of a wave * Mechanical waves * Electromagnetic waves * Transverse waves * Longitudinal waves * Amplitude * Wavelength * Frequency * Time period * Calculating frequency and equation * Relationship between frequency and wavelength when speed is constant. * Calculating time period from frequency with equations * The speed equation * Measuring distance and time * Simple experiment for the speed of sound * Improving experiments * Echoes * Speed of sound experiment with microphones and oscilloscope. * Ray diagrams * Absorption, reflection and transmission * Sonar * Ultrasound * Rearranging equation * Refraction * Relationship between wave speed and wavelength * Structure of the ear. * Frequency range of human hearing. * Explanation of the limited frequency range of humans. * Explanation for hearing deteriorating with age. * Order of the electromagnetic spectrum * Wavelength and frequency relationship * Application of wave speed equation * Rearranging equation * Producing and detecting radio waves * Recall that light is an electromagnetic wave * Give examples of some practical uses of electromagnetic waves in the radio, micro-wave, infra-red, visible, ultraviolet, X-ray and gamma-ray regions * Describe how ultra-violet waves, X-rays and gamma rays can have hazardous effects, notably on human bodily tissues. * Explain that electromagnetic waves transfer energy from source to absorber to include examples from a range of electromagnetic waves * Precautions for ultra-violet waves, X-rays and gamma rays * Careers: Medical Physicist * X-rays * CT scans * Gamma imaging * Thermogram * Magnetic Resonance Imaging * Precautions for using ionising radiation * Law of reflection * Labeling and measuring angles of incidence and reflection * Practical activity instructions - fully animated. * Reflection, absorption, and refraction is affected by wavelength of electromagnetic wave. * Refraction the change of velocity - speed and direction * Magnitude of refraction depending on wavelength * Magnitude of refraction depending on optical density * Refraction practical activity instructions * Wave speed, wavelength, and frequency relationship in refraction * Convex and Concaves lenses * Eyes and corrective lenses * Refraction and wavelength * Focal points for lenses * Determining the type of images produced through a lens * Names of colours for the visible spectrum * Coloured filters * Coloured objects acting as a coloured filters * White light and refracting prism * Refraction and wavelength * Specular reflection * Diffuse scattering * Scattering - Why the sky is blue and milk is white.
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GCSE OCR Physics P5.2 Electromagnetic Spectrum
Resources for P5.2 GCSE OCR Physics Gateway 9-1 Triple and Combined (Higher and Foundation) is covered in this material. Each lesson includes student activities and full worked answers. * Order of the electromagnetic spectrum * Wavelength and frequency relationship * Application of wave speed equation * Rearranging equation * Producing and detecting radio waves * Recall that light is an electromagnetic wave * Give examples of some practical uses of electromagnetic waves in the radio, micro-wave, infra-red, visible, ultraviolet, X-ray and gamma-ray regions * Describe how ultra-violet waves, X-rays and gamma rays can have hazardous effects, notably on human bodily tissues. * Explain that electromagnetic waves transfer energy from source to absorber to include examples from a range of electromagnetic waves * Precautions for ultra-violet waves, X-rays and gamma rays * Careers: Medical Physicist * X-rays * CT scans * Gamma imaging * Thermogram * Magnetic Resonance Imaging * Precautions for using ionising radiation
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