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Questions  >>  CBSE XII  >>  Math  >>  Model Papers

In Young’s double slit experiment, the two slits $0.15\;m$ apart are illuminated by monochromatic light of wavelength 450nm.$ The screen is $1.0\;m$ away from the slits. 1. Find the distance of the second a) bright fringe b) dark fringe from the central maximum. 2. How will the fringe pattern change, if the screen is moved away from the slits?

1 Answer


a) 3*10^-6 m

b) 7.5*10^-6 m

c) it will decrease as fringe width =lambda D/d

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