First slide

Young's double slit Experiment

Question

Statement 1: In Young's double slit experiment, the fringes become indistinct if one of the slits is covered with cellophane paper.
Statement 2: The cellophane paper decrease the wavelength of light.

Moderate

A

Both statements 1 and 2 are correct
B

Statement 1 is correct statement 2 is incorrect
C

Statement 1 is incorrect statement 2 is correct
D

Both statements 1 and 2 are incorrect

Solution

When one of slits is covered with cellophane paper, the intensity of light emerging from the slit is decreased (because this medium is translucent). Now the two interfering beam have different intensities or amplitudes. Hence intensity at minima will not be zero and fringes will become indistinct.

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