Revision Of Light chapter
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| What is the main source of light and heat energy on the earth? | The Sun
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| Light travels in straight lines but what are these lines called? | Rays
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| What are luminous bodies? | Bodies that give off their own light.
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| Give an example of a luminous body. | Sun, Light bulb, candle
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| What are non-luminous bodies? | Bodies that do not give off their own light. They reflect light.
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| What do you call the bouncing of light rays off a surface? | Reflection
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| What is refraction? | The bending of light as it travels from one medium to another.
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| Give a use of refraction. | Lenses in glasses or telescope
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| What is the splitting of white light into its seven colours called? | Dispersion
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| What are the seven colours of white light? | Red, Orange, Yellow, Green, Blue, Indigo, Violet
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| Which colour is always at the outside of a rainbow? | Red
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| Which colour is always at the inside of a rainbow? | Violet
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| What is responsible for dispersing the sunlight in a rainbow? | Water droplets in the air (rain)
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| What do you use in the lab to disperse white light into its seven colours? | Prism
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| What is the more common name for the seven colours of white light? | The spectrum
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| Which type of lens causes parallel light rays to focus on the one point? | Convex (Converging) Lens
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| Which type of lens causes parallel light rays to spread out? | Concave (Diverging) Lens
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| What is the dark area behind an object, caused by light rays being blocked out, more commonly known as? | A Shadow
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