A thin prism having refracting angle 
is made of glass of refractive index 1.42. This prism is combined with another thin prism of glass of refractive index 1.7. This combination produces dispersion without deviation. The refracting angle of second prism should be [NEET 2017]
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Let prism angle of the first and second prisms are 
and 
respectively.
Similarly, their refractive indices are 
and 
. Condition for dispersion without deviation is
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