Question
Question: For a prism, its refractive index is cot A/2. Then minimum angle of deviation is –...
For a prism, its refractive index is cot A/2. Then minimum angle of deviation is –
A
180 – A
B
1800 – 2A
C
900 – A
D
A2
Answer
1800 – 2A
Explanation
Solution
Cot A/2 =
=
sin (90 – A/2) = sin
so dm = 1800 – 2A