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  •  In Young's double slit experiment, if the widths of the slit are in the ratio 4:9, ratio of intensity of maxima to intensity of minima will beOption: 1

 In Young's double slit experiment, if the widths of the slit are in the ratio 4:9, ratio of intensity of maxima to intensity of minima will be

Option: 1

25:1


Option: 2

9:4


Option: 3

3:2


Option: 4

81:16


Answers (1)

best_answer

As ratio of slit widths =  Ratio of intensities

\therefore \frac{\mathrm{I}_{1}}{\mathrm{I}_{2}}=\frac{9}{4}$ or $\frac{\mathrm{a} 1^{2}}{\mathrm{a} 2^{2}}=\frac{9}{4}$ or $\frac{\mathrm{a} 1}{\mathrm{a} 2}=\frac{3}{2}

a_{\max }=a_{1}+a_{2}=3+2=5 ; a_{\min .}=3-2=1

\mathrm{\frac{I_{\text {max. }}}{I_{\text {min. }}}=\frac{(a 1+a 2)^{2}}{(a 1-a 2)^{2}}=\frac{(3+2)^{2}}{(3-2)^{2}}=\frac{25}{1}}

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manish

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