A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A )…

A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A) and emerges normally from the opposite surface. If the refractive index of the material of the prism is μ, then the angle of incidence is nearly equal to:
  1. 2Aμ
  2. μA
  3. μA2
  4. A2μ

Solution

r2=0

r1=A

Apply Snell's law

sin i=μ sin r1

for small angle r1=A

i=μA

Asked in: NEET 2020 (Phase 1)

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