A parallel beam of light is incident from air at an angle α 𝛼 on the side of right angled triangular prism of refractive index μ = √2 𝜇 = 2 . Light undergoes total internal reflection in the prism at the face 𝑃𝑅 when 𝛼 has a minimum value of 45. The angle θ 𝜃 of the prism is. - VgyanHub

Question:

A parallel beam of light is incident from air at an angle α 𝛼 on the side of right angled triangular prism of refractive index μ = √2 𝜇 = 2 . Light undergoes total internal reflection in the prism at the face 𝑃𝑅 when 𝛼 has a minimum value of 45. The angle θ 𝜃 of the prism is.

Options :

(a) 15 degree
(b) 22.5 degree
(c) 30 degree
(d) 45 degree

Answer :

(a) 15 degree

Answer Steps :

step 1

step 2

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