Question

For an equilateral glass prism angle of incidence is 3/4 of angle of prism. If angle of incidence is equal to the angle of emergence then angle of deviation will be (A)60 (B)30 (C)45 (D)0 ​

Answer 1

Answer:

(B)30

Explanation:

Given:

Angle of incident i= Angle of emergence = 3/4  A

Where , A= Angle of prism

Since prism is equilateral A=60

∴i=e=60  ∘  ×  3/4 =45  ∘

 From prism formula:

Angle of deviation , δ=i+e−A=45+45−60=30  o