JEE PHYSICS MCQ: WAVE OPTICS

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Fringe width in a YDSE is measured to be

\beta

. What will be the fringe width if the wavelength of incident light is tripled, the separation between the slits is halved and the separation between the screen and the slits doubled?

View answer and explanation

Correct option: B

12 \beta

Option B (

12 \beta

) is correct because the fringe width is directly proportional to the wavelength and the distance to the screen, and inversely proportional to the slit separation.

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