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In a double slit experiment, the distance between the slits is 3 mm and the slits are 2 m away from the screen. Two interference patterns can be seen on the screen one due to light with wavelength 480 nm, and the other due to light with wavelength 600 nm. What is the separation on the screen between the fifth order bright fringes of the two interference patterns? |
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Answer» Solution :`beta=lambda.D//d` 5th BRIGHT `=5beta_(1)=5lambdaD//d=5 XX 480 xx 10^(-9) xx 2//3 xx 10^(-3)=16 xx 10^(-4)m` 5th bright `=5beta_(2)=Slambda1D//d=5 xx 600 xx 10^(-9) xx 2//3 xx 10^(-3) =20 xx 10^(-4)m` distance between two 5th bright fringes `=(20-16)xx 10^(-4) =4 xx 10^(-4)m` |
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