Question

A thin prism having refracting angle 10° 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 :-
(1) 60 (2) 8 (3) 10° (4) 4°​

Answer 1

Answer:

2 option is best once for that is 8