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प्रश्न
Which of the following coloured light has the least speed in glass prism?
(a) violet
(b) yellow
(c) red
(d) green
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उत्तर
Violet
The colour violet travels the slowest in a glass prism owing to its short wavelength.
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संबंधित प्रश्न
In the following ray diagram the correctly marked angle are:
(a) ∠i and ∠e
(b) ∠A and ∠D
(c) ∠i, ∠e and ∠D
(d) ∠r, ∠A and ∠D
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Write an Explanation.
Critical angle
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The angle of deviation through a prism is minimum when
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- The angle of incidence is equal to that of the angle of emergence.
- When the angle of emergence has doubled the angle of incidence.
Choose the correct answer from the options given below:
In the following diagram showing dispersion of white light by a glass prism, the colours 'P' and 'Q’ respectively are:
