Assertion: In YDSE bright and dark fringe are equally spaced. Reason: It only depends upon phase difference.

Question

Assertion: In YDSE bright and dark fringe are equally spaced. Reason: It only depends upon phase difference. (A) If both assertion and reason are true and reason is the correct explanation of assertion. (B) If both assertion and reason are true but reason is not the correct explanation of assertion. (C) If assertion is true but reason is false. (D) If both assertion and reason are false.

Tardigrade Admin · Accepted Answer

Fringe width is given by, β=(Dλ/d) where, D = distance between stil and screen, d = distance between coherent sources of light and λ = wavelength of incident light.

Q. Assertion : In YDSE bright and dark fringe are equally spaced.
Reason : It only depends upon phase difference.

If both assertion and reason are true and reason is the correct explanation of assertion.

If both assertion and reason are true but reason is not the correct explanation of assertion.

If assertion is true but reason is false.

If both assertion and reason are false.

Fringe width is given by, $β = \frac{D λ}{d}$
where, D = distance between stil and screen,
d = distance between coherent sources of light
and $λ$ = wavelength of incident light.

Q. Assertion : In YDSE bright and dark fringe are equally spaced. Reason : It only depends upon phase difference.