KCET2020PhysicsRay Optics
The refracting angle of prism is A and refractive index of material of prism is A 2 . The angle of minimum deviation is A
Options
- A180^ -3 A
- B180^ +2 A
- C90^ -A
- D180^ -2 A
Correct answer
D. 180^ -2 A
Step-by-step solution
Given, angle of prism =A Refractive index of prism, = A 2 As, we know, = ( A+ _ m 2 ) ( A 2 ) where, _ m = angle of minimum deviation. ( A 2 )= ( A+ _ m 2 ) ( A 2 ) ( A 2 ) ( A 2 ) = ( A+ _ m 2 ) ( A 2 ) (90^ - A 2 )= ( A+ _ m 2 ) 180^ -A 2 = A+ _ m 2 _ m =180^ -2 A