Optics Question 1045
Question: Two coherent sources of different intensities send waves which interfere. The ratio of maximum intensity to the minimum intensity is 25. The intensities of the sources are in the ratio
[UPSEAT 2002]
Options:
A) 25 : 1
B) 5 : 1
C) 9 : 4
D) 25 : 16
Show Answer
Answer:
Correct Answer: C
Solution:
$ \frac{{I _{\max }}}{{I _{\min }}}={{( \frac{\sqrt{\frac{I _{1}}{I _{2}}}+1}{\sqrt{\frac{I _{1}}{I _{2}}}-1} )}^{2}}\Rightarrow \frac{I _{1}}{I _{2}}=\frac{9}{4} $
