Question

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Answer 1

✴Intensity ratio of two light waves have different amplitude.

Let "a" and "b" be the amplitudes and I 1 and I 2 be the intensities of light waves from two different sources.

As. Intensity ∝ Amplitude ²

$\frac{ i_{1} }{ i_{2} } = \frac{ {a}^{2} }{ {b}^{2} }$

➡Amplitude at a maximum in interference pattern

=> a + b

➡Amplitude at a minimum in interference pattern

=> a – b

Therefore, the ratio of intensities at maxima and minima is

$\frac{ I_{max} }{ I_{min} } = \frac{ {(a + b)}^{2} }{ {(a - b)}^{2} }$

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