Question
Question: A light ray is incident at almost 90º on the inclined face. Find the deviation suffered by after it ...
A light ray is incident at almost 90º on the inclined face. Find the deviation suffered by after it passes through prisms for second time –
A
600
B
300
C
900
D
1800
Answer
900
Explanation
Solution

sin 900 =32sin qc
sin qc =23 ̃ qc = 600
300+ 900– qc + 900+ r = 1800
r = qc – 300 = 300
\ r1 = 300 – r = 00
so light will emerge out normally