JEE Main202125 Feb 2021Morning ShiftPhysicsWave OpticsActual
Two coherent light sources having intensity in the ratio 2 x produce an interference pattern. The ratio I max - I min I max + I min will be
Options
- A2 2 x x + 1
- B2 x 2 x + 1
- C2 2 x 2 x + 1
- D2 x x + 1
Correct answer
C. 2 2 x 2 x + 1
Step-by-step solution
Given that, I 1 I 2 = 2 x . We know, I max = I 1 + I 2 2 & I min = I 1 - I 2 2 ∴     I max - I min I max + I min = 2 I 1 I 2 I 1 + I 2 = 2 I 1 / I 2 I 1 I 2 + 1 = 2 2 x 2 x + 1