Home
Class 12
PHYSICS
Assertion (A) : For best contrast betwee...

Assertion (A) : For best contrast between maxima and minima in the interference pattern of Young's double slit experiment the intensity of light emerging out of the two slits should be equal.
Reasson (R ) : The intensity of interference pattern is proportional to the square of the amplitude.

A

(a) If both the assertion and reason are true and reason explains the assertion assertion.

B

(b) If both assertion and reason are true but reason does not explain the assertion

C

(c) If assertion is true but reason is false.

D

(d) If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
B
When intensity of light emerging from two slits is equal, the intensity at minima,
`I_(min)=(sqrt(I_a)-sqrt(I_b))^2=0`, or absolute dark.
It provides a better contrast.
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    A2Z|Exercise Section D - Chapter End Test|29 Videos

  • WAVE OPTICS

    A2Z|Exercise AIIMS Questions|25 Videos

  • SOURCE AND EFFECT OF MAGNETIC FIELD

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

Assertion (A): For best contrast between maxima and minima in the interference pattern of Young's double slit experiment, the amplitudes of light waves emerging from the two sources should be equal. Reason (R): For interference, the sources must be coherent.

Contrast of the fringe pattern obtained in Young's double-slit experiment depends on

In Young's double slit experiment, the widths of two slits are n the ratio 4 : 1 . The ratio of maximum and minimum intensity in the interference pattern will be :

In a double slit experiment instead of taking slits of equal widths, one slit is made twice as wide as the other. Then, in the interference pattern

In a double slit experiment, instead of taking slits of equal widths, one slit is made twice as wide as the other. Then, in the interference pattern

Find the ratio of intensity of maxima and minima in the interference pattern if the two slits used in Young's experiment have width ratio 4:9.

Assertion (A) : The maximum intensity in interference pattern is four times the intensity in interference pattern is four times the intensity due to each slit of equal width. Reason (R ) : Intensity is directly proportinal to square of amplitude.