A prism having an apex angle 4 0 and refractive index 1.5 is located in front of a vertical plane mirror as shown in figure. Through what total angle is the ray deviated after reflection from the mirror?
Text Solution
Verified by ExpertsThe correct answer is:
C
δ = ( μ – 1) A = (1.5 – 1) 4 = 2 0
Deviation by mirror = 180 – ∠ ∠ i = 176 0
∴ Total deviation = 2 + 176
= 178 0
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