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p14: light (refraction (how much a wave is refracted depends on how much…
p14: light
refraction
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when a light ray refracts as it travels from air to glass the angle of refraction is less than the angle of incidence
when a light refracts as it travels from glass to air the angle of refraction is more than the angle of incidence
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how much a wave is refracted depends on how much the wave speeds up or slows down which depends of the density
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lenses
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to describe an image u must talk about: size compared to object, whether its real or virtual and whether its upright or inverted
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colour
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primary colours: red, blue, green
secondary colours: cyan, magenta, yellow
different objects absorb, transmit or reflect different wavelengths of light in different ways
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reflection
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diffuse reflection
when a wave is reflected by a rough surface and the reflected rays are scattered in lots of different directions.
the normal is different for each incoming ray, so angle of incidence is different for each ray. but law of reflection still applies
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