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In a YDSE green light of wavelength 500 ...

In a YDSE green light of wavelength 500 nm is used. Where will be the second bright fringe be formed for a set up in which separation between slits is 4 mm and the screen is placed 1 m from the slits?

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`y_2=(2 lamda D)/d=(2 times 500 times 10^-9 times 1)/(4 times 10^-3)=0.25 nm`.
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