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Question
Which of these devices cannot be used to prove light is a spectrum of colours?
Which of these devices cannot be used to prove light is a spectrum of colours?
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Solution
The correct option is B A hot desert
Spinning a Newton's disc, i.e. a disc with 7 equal segments coloured the 7 colours of a rainbow, makes the disc look almost white proving that light is a spectrum.
Holding a screen against a glass prism or looking at petrol floating on water in a lit environment, we can see the light being dispersed.
The hot desert doesn't help to disperse light or prove in any other way that light is a spectrum.
Spinning a Newton's disc, i.e. a disc with 7 equal segments coloured the 7 colours of a rainbow, makes the disc look almost white proving that light is a spectrum.
Holding a screen against a glass prism or looking at petrol floating on water in a lit environment, we can see the light being dispersed.
The hot desert doesn't help to disperse light or prove in any other way that light is a spectrum.
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