Question

If the ratio of amplitude of two waves is 4 : 3. Then the ratio of maximum and minimum intensity will be

• A. 16 : 18
• B. 18 : 16
• C. 49 : 1
• D. 1 : 49

Answer 1

Answer: (C)

49 : 1

Answer 2

$\frac{I_{\max}}{I_{\min} = \left( \frac{\frac{a_{1}}{a_{2}} + 1}{\frac{a_{1}}{a_{2}} - 1} \right)^{2} = \left( \frac{\frac{4}{3} + 1}{\frac{4}{3} - 1} \right)^{2} = \frac{49}{1}}$