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Physics - Topic 5 (Angle of refraction = angle of incidence, A luminous…
Physics - Topic 5
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Colour spectrum: Red, Orange, Yellow, Green, Blue, Indigo, Violet
Specular reflection
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Electromagnetic spectrum (shortest wavelength to longest): gamma rays, x-rays, ultraviolet, visible light, infrared, microwaves, radio waves
Some radio waves and all microwaves pass through the ionosphere. Some frequencies of radio waves are refracted by the ionosphere.
There is a maximum range for microwave communication because the curved surface of the Earth gets in the way
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Diffuse reflection
Refraction
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Microwaves:
Uses: -Heats water molecules in food
-Mobile phone communication
Dangers: -Internal heating
-Skin burns
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