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  • In an interference pattern by two identical slits, intensity of central maxima is . If one slit is clo

In an interference pattern by two identical slits, intensity of central maxima is \mathrm{I}. If one slit is closed, intensity of central maxima changes to \mathrm{I}_{0}. Then \mathrm{I} and \mathrm{I}_{0}  are related by

Option: 1

\mathrm{I=I_{0}}


Option: 2

\mathrm{I}=2 \mathrm{I}_{0}


Option: 3

I=3 \mathrm{I}_{0}


Option: 4

\mathrm{I=4 I_{0}}


Answers (1)

best_answer

\mathrm{I_{1}=I_{2}=a^{2} }

\mathrm{I_{\text {max. }}=(a+a)^{2}=4 a^{2}=1 }

If one slit is closed,

Intensity, \mathrm{\mathrm{I}_{0}=(\mathrm{a})^{2} }

\mathrm{\therefore \frac{\mathrm{I}}{\mathrm{I}_{0}}=\frac{4 \mathrm{a}^{2}}{\mathrm{a}^{2}}=4 \text { or } \mathrm{I}=4 \mathrm{I}_{0} }

Posted by

Rakesh

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