In Young’s double-slit experiment, lights of green, yellow, and orange colors are successively used. Write the fringe widths for the three colors in increasing order.(a) βG < βY < βO(b) βO < βY < βG(c) βO < βG < βY(d) βY < βG < βOThe question was posed to me during a job interview.This intriguing question comes from Wave Optics topic in chapter Wave Optics of Physics – Class 12

In Young’s double-slit experiment, lights of green, yellow, and oran

1.	In Young’s double-slit experiment, lights of green, yellow, and orange colors are successively used. Write the fringe widths for the three colors in increasing order.(a) βG < βY < βO(b) βO < βY < βG(c) βO < βG < βY(d) βY < βG < βOThe question was posed to me during a job interview.This intriguing question comes from Wave Optics topic in chapter Wave Optics of Physics – Class 12
Answer» The CORRECT option is (b) βO < βY < βG To explain: Fringe WIDTH is EXPRESSED as: β = \(\FRAC {D\lambda }{d}\). Since the wavelength are related as shown ➔ λG < λY < λO, we can say that ➔ βG < βY < βO.

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