MHT CET2018PhysicsWaves and Sound
Two light waves of intensities I 1 and I 2 having same frequency pass through the same medium at a time in the same direction and interfere. The sum of the minimum and maximum intensities is
Options
- AI 1 + I 2
- B2 I 1 + I 2
- CI 1 + I 2
- DI 1 - I 2
Correct answer
B. 2 I 1 + I 2
Step-by-step solution
I max = ( a 1 + a 2 ) 2 I min = ( a 1 − a 2 ) 2 I max + I min = a 1 2 + a 2 2 + a 1 2 + a 2 2 = 2 ( a 1 2 + a 2 2 ) = 2 ( I 1 + I 2 )