Question

Find the angle of deviation (antiokwise) suffered by a may incident on a plane minor (as shown in figure) at an angle of incidence 30°
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Answer 1

Explanation:

δ ACW = 180° – 60°

= 120°

Anticlockwise δ CW = 180° + 60°

= 240°

Answer 2

Answer:

Since angle of incident =angle of reflection

Hence r=30°

And here angle of deviation,

δ=180° −(i+r)

δ=120°

See the attachment.

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Edit : Exams kese jaa rhe hain.