Q29. Two coherent monochromatic light beams of intensities I and 4 I are superimposed. The difference between maximum and minimum possible intensities in the resulting beam is $x \mathrm { I }$. The value of $x$ is $\$$ $\_\_\_\_$ .
Q29. Two coherent monochromatic light beams of intensities I and 4 I are superimposed. The difference between maximum and minimum possible intensities in the resulting beam is $x \mathrm { I }$. The value of $x$ is $\$$ $\_\_\_\_$ .