A thin prism p 1 with angle 4° and made from glass of refractive index 1.54 is combined with another prism p 2 made from glass of refractive index 1.92 to produce dispersion without deviation. Then the angle of prism P 2 is

Question

Philoid · Accepted Answer

The angle of deviation for a prism the is given by

∆ = (n – 1) × A

Where,

n = refractive index of prism

A = angle of prism

Given: The two prisms when combined produce dispersion without deviation.

Conclusion: For no deviation for the two prism the deviation caused by two prism should be opposite to each other

(n₁ – 1)×A₁ = (n₂ – 1) × A₂

A₂ =

A₂ = 4.3^o

A thin prism p1 with angle 4° and made from glass of refractive index 1.54 is combined with another prism p2 made from glass of refractive index 1.92 to produce dispersion without deviation. Then the angle of prism P2 is

A thin prism p₁ with angle 4° and made from glass of refractive index 1.54 is combined with another prism p₂ made from glass of refractive index 1.92 to produce dispersion without deviation. Then the angle of prism P₂ is