JIPMER2010PhysicsWave Optics
Two coherent light beams of intensities I and 4 I are superposed. The maximum and minimum possible intensities in the resulting beam are
Options
- A5 I and I
- B5 I and 3 I
- C9 I and I
- D9 I and 3 I
Correct answer
C. 9 I and I
Step-by-step solution
Given, aligned I₁=I, I₂ & =4 I I_ & = ( I₁ + I₂ )^2 & =( I + 4 I )^2=(3 I )^2=9 I I_ & = ( I₁ - I₂ )^2=( I - 4 I )^2 & =(- I )^2=I aligned