A crown glass prism of angle 5∘ is to be combined with a flint glass prism in such a way that the mean ray passes undeviated. The angle of flint glass prism is A′ and angular deviation produced by the combination when white light goes through it is δ. Refractive indices for red, yellow and violet light are 1.514, 1.517 and 1.523 respectively for crown glass and 1.613, 1.620 and 1.632 for flint glass. Then :
|Why this question :
In this type of questions where two prisms are involved, put the values of the refractive index and angle of the prism carefully.