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Question

The refractive index of the substance of an equilateral prism is 3, then the angle of minimum deviation of the prism will be
  1. 30
  2. 45
  3. 75
  4. 60

A
30
B
45
C
60
D
75
Solution
Verified by Toppr

μ=sin(A+δm2)sin(A/2)

3=sin(60+δm2)sin(602)

32=sin(60+δm2)

60+δm2=60

δm=60

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