Q. If an interference pattern has maximum and minimum intensities in 36 : 1 ratio then what will be the ratio of amplitudes
A) 5 : 7
B) 7 : 4
C) 4 : 7
D) 7 : 5
Explanation
(d) $\frac{I_{\max}}{I_{\min}} = \left( \frac{\frac{a_{1}}{a_{2}} + 1}{\frac{a_{1}}{a_{2}} - 1} \right)^{2} \Rightarrow \frac{a_{1} + a_{2}}{a_{1} - a_{2}} = 6$
$\frac{7}{5} = \frac{a_{1}}{a_{2}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.