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Physics 10
Why is red colour of the dispersed white light on the top, while the violet on the bottom of the rainbow?
The reason is that red light travels at a faster speed than the violet light. Therefore, the red light will bent away from the normal. The violet light travels at a slower speed than the red light, and therefore will bend towards the normal. Hence, the red light will appear to be on top of the rainbow while the violet will be at the bottom.
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