Optics Question 1133

Question: In Young’s double slit experiment the wavelength of light was changed from 7000 Å to 3500 Å. While doubling the separation between the slits which of the following is not true for this experiment

[Orissa JEE 2002]

Options:

A) The width of the fringes changes

B) The colour of bright fringes changes

C) The separation between successive bright fringes changes

D) The separation between successive dark fringes remains unchanged

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Answer:

Correct Answer: D

Solution:

$ \beta \propto \frac{\lambda }{d} $



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