Question

A thin prism P₁ with angle 4° made of glass of refractive index 1.54 is combined with another thin prism P₂ made of glass of refractive index 1.72 to produce no deviation. The angle of prism P₂ is(a) 3°(b) 2.6°(c) 4°(d) 5.33°

Answer 1

Answer:

For dispersion without deviation,

(μ

1

−1)×A

1

=(μ

2

−1)×A

2

μ

1

=1.54,A

1

=4°,μ

2

=1.72

(1.54−1)×4=(1.72−1)×A

2

=> A

2

=3

∘

.