MCQ
If two light waves having same frequency have intensity ratio $4: 1$ and they interfere, the ratio of maximum to minimum intensity in the pattern will be
- ✓$9: 1$
- B$3: 1$
- C$25: 9$
- D$16: 25$
✓
Answer
Correct option: A.
$9: 1$
$\frac{I_{\max }}{I_{\min }}=\left(\frac{\sqrt{\frac{I_1}{I_2}}+1}{\sqrt{\frac{I_1}{I_2}}-1}\right)^2=\left(\frac{\sqrt{\frac{4}{1}}+1}{\sqrt{\frac{4}{1}}-1}\right)^2=\frac{9}{1}$
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