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Consider the diffraction pattern for a s...

Consider the diffraction pattern for a small pinhole. As the size of the hole is increased

A

the size decreases

B

the intensity increases

C

the size increases

D

the intnesity decreases

Text Solution

Verified by Experts

The correct Answer is:
A, B
The half angular fringe width of central maximum for a diffraction pattern through a pinhole of aperture a is
`theta = lambda/a`
`:. theta prop 1/a`
As the size of the pinhole (a) increases, the angular width of central maximum decreases. when size of hole increases, then more light enters through hole,which results in increase of intensity.
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