Question

13. At the first minimum adjacent to the central
maximum of a single-slit diffraction pattern, the
phase difference between the Huygen's wavelet
from the edge of the slit and the wavelet from the
mid-point of the slit is
[Re-AIPMT-2015]
(1)pi/8
radian
(2)pi/4 radian
(3)pi/2
radian
(4) pi radian

Answer 1

Answer:

Correct option (a) π radian Explanation: The situation is shown in the figure. In figure A and B represent the edges of the slit AB of width a and C represents the midpoint of the slit. For the first minimum at P, asinθ = λ ..............(i) where λ is the wavelength of light. The path difference between the wavelets from A to C is Read more on Sarthaks.com - https://www.sarthaks.com/231843/first-minimum-adjacent-central-maximum-single-slit-diffraction-pattern-phase-difference