Question
The angle of prism is `6^circ` and its refractive index for green light is 1.5. For a green ray passes through it the deviation will be :
Answer: Option D
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For small angled prism - `delta m = (mu - 1)A`
where `delta m ` = deviation of light in prism,
`mu` = refractive index = 1.5
A = angle of prism = `6^circ`
Therefore , `delta m` = (1.5 - 1) x `6^circ`
= 0.5 x `6^circ = 3^circ`
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