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Physics Waves 3 - Coggle Diagram
Physics Waves 3
Light and Sound
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Practical (3.17)
investigate the refraction of light, using rectangular blocks, semi-circular blocks and triangular prisms
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Pitch and Loudness (3.28P, 3.29P)
Pitch
the higher the frequency, the higher the pitch (x)
Loudness
the higher the sound, the higher the amplitude (y)
Practical (3.19)
Investigate the refractive index of glass, using a glass block
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Properties of Waves
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Definitions(3.3)
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wavelength: the distance between a particular point on one cycle of the wave and the same point on the next
wave front: created by overlapping lots of different waves. where all vibrations are in phase the same distance from the source
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Transfer of energy (3.4)
wave: a means of transferring energy and information from one point to another without being any transfer of matter between 2 points
Doppler Effect (3.8)
Doppler effect: there is a change in the observed frequency and wavelength of a wave when its source is moving relative to an observer
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Electromagnetic Spectrum
Vacuum (3.11)
light is a per of a continuous electromagnetic spectrum that includes radio, microwaves, infrared, visible, ultraviolet, x-ray and gamma ray radiation and that all these waves travel at the same speed in free space
Electromagnetic Spectrum list - frequency, wavelength, colours (3.11)
- radio waves
- microwaves
- infra-red
- visible light
- ultra-violet
- x-rays
- gamma rays
Uses and Dangers of electromagnetic radiation (3.12, 3.13)
Uses
- radio waves: broadcasting and communications
- microwaves: cooking satellite transmissions
- infra-red: heaters and night vision equipment
- visible light: optical fibres and photography
- ultra-violet: fluorescent lamps
- x-rays: observing the internal structure
- gamma rays: sterilising food and medical equipment
Dangers
- microwaves: internal heating of body tissue
- infrared: skin burns
- ultraviolet: damage to surface cells and blindness
- gamma rays: cancer, mutation
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