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Fill in the blanks with suitable words:(a) When a ray of light enters a prism, it bends __________ the normal ; as it leaves the prism, it bends __________ the normal.(b) White light is composed of __________ colours. The colour of white light deviated through the largest angle by a prism is __________.
(a) When a ray of light enters a prism, it bends towards the normal; as it leaves the prism, it bends away from the normal.
(b) White light is composed of seven colours. The colour of white light deviated through the largest angle by a prism is violet.
Explanation
In a glass prism, when a beam of white light enters, it bends towards the normal, as it is going from a rarer medium (air) to a denser medium (glass), and gets splits into its seven constituents colours. When these different colours of light rays leave the prism, it bends away from the normal as it is going from a denser medium (glass) to a rarer medium (air).
Updated on: 10-Oct-2022
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