Q. The two interfering waves have intensities in the ratio 9 : 4. The ratio of intensities of maxima and minima in the interference pattern will be
A) 1 : 25
B) 25 : 1
C) 9 : 4
D) 4 : 9
Explanation
(b) $\frac{I_{\max}}{I_{\min}} = \left( \frac{\sqrt{\frac{I_{1}}{I_{2}}} + 1}{\frac{\sqrt{I_{1}}}{\sqrt{I_{2}}} - 1} \right)^{2} = \left( \frac{\sqrt{\frac{9}{4}} + 1}{\sqrt{\frac{9}{4}} - 2} \right)^{2} = \frac{25}{1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.