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The refractive index of the mean ray in ...

The refractive index of the mean ray in a spectrum is 1.620 . A ray of light passes through a prism whose refracting angle is `10^(@)` and the dispersive power is `0.031` . What is the dispersion produced by the prism ?

A

`0.182 ^(@)`

B

`0.192 ^(@)`

C

`0.175^(@)`

D

`0.162^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
Angular dispersion = Dispersive power `xx` Mean deviation = `omega delta` But `delta = A(n-1) = 10^(@) [n_(y) - 1.55]`
`therefore` Angular dispersion = `0.031 xx 6.2 = 0.192^(@)`
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