In Young’s double-slit experiment with monochromatic light, how is fringe width affected, if the screen is moved closer to the slits?(a) Independent(b) Remains the same(c) Increases(d) DecreasesThis question was posed to me in an internship interview.Enquiry is from Wave Optics in section Wave Optics of Physics – Class 12

In Young’s double-slit experiment with monochromatic light, how is f

1.	In Young’s double-slit experiment with monochromatic light, how is fringe width affected, if the screen is moved closer to the slits?(a) Independent(b) Remains the same(c) Increases(d) DecreasesThis question was posed to me in an internship interview.Enquiry is from Wave Optics in section Wave Optics of Physics – Class 12
Answer» Right option is (C) Increases For EXPLANATION I WOULD SAY: Fringe width is given as: β = \(\frac {D\lambda }{d}\) As the SCREEN is moved closer to the two slits, the distance denoted by D decreases and so fringe width β increase.

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