If the intensities of two interfering waves be \( \mathrm{I}_{1} \) and \( \mathrm{I}_{2} \), th...

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If the intensities of two interfering waves be \( \mathrm{I}_{1} \) and \( \mathrm{I}_{2} \), the contrast between maximum and minimum intensity is maximum, when
(a) \( \mathrm{I}_{1}\mathrm{I}_{2} \)
(b) \( \mathrm{I}_{1} \ll\mathrm{I}_{2} \)
(c) \( \mathrm{I}_{1}=\mathrm{I}_{2} \)
(d) either \( \mathrm{I}_{1} \) or \( \mathrm{I}_{2} \) is zero
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