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Question

Question: A crown glass prism of refracting angle 6<sup>0</sup> is to be used for deviation without dispersion...

A crown glass prism of refracting angle 60 is to be used for deviation without dispersion with a flint glass of angle of prism a. Given: for crown glass µr = 1.513 and µv = 1.523, for flint glass µr = 1.645 and µv = 1.665. Find a

A

30

B

40

C

4.50

D

50

Answer

30

Explanation

Solution

() a1 = () a2

or a2 =(1.5231.513)(1.6651.645)\frac { ( 1.523 - 1.513 ) } { ( 1.665 - 1.645 ) }60 = 30.