If the ratio of amplitude of two waves is $4 : 3$. Then the ratio of maximum and minimum intensity will be
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(c) $\frac{{{I_{\max }}}}{{{I_{\min }}}} = {\left( {\frac{{\frac{{{a_1}}}{{{a_2}}} + 1}}{{\frac{{{a_1}}}{{{a_2}}} - 1}}} \right)^2} = {\left( {\frac{{\frac{4}{3} + 1}}{{\frac{4}{3} - 1}}} \right)^2} = \frac{{49}}{1}$
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