Question 379: Wave Optics

Question

A graph is plotted between the fringe-width Z and the distance D between the slit and eye-piece, keeping other adjustment same. The correct graph is
(A)
(B)
(C)
(D)
![](['https://app-content.cdn.examgoal.net/fly/@width/image/jaoe38c1m1odui1x/a62f5217-2df0-48fa-b3f5-8e8dc83678b1/95768860-7ed2-11ef-883e-2f234107f4d8/file-jaoe38c1m1odui1y.png?format=png', 'https://app-content.cdn.examgoal.net/fly/@width/image/jaoe38c1m1oduuwr/b6d65a60-88a8-4390-b116-485ed1fc18df/9f64ccb0-7ed2-11ef-883e-2f234107f4d8/file-jaoe38c1m1oduuws.png?format=png', 'https://app-content.cdn.examgoal.net/fly/@width/image/jaoe38c1m1odvbli/5fbf622e-4676-4da9-a8cd-1b17af203e87/ac48d160-7ed2-11ef-883e-2f234107f4d8/file-jaoe38c1m1odvblj.png?format=png', 'https://app-content.cdn.examgoal.net/fly/@width/image/jaoe38c1m1odvkzw/e9812e44-7631-4dc4-9f4a-2060c7938a32/b38ba4c0-7ed2-11ef-883e-2f234107f4d8/file-jaoe38c1m1odvkzx.png?format=png'])

Accepted Answer

The fringe width is given by
$Z=\frac{D \lambda}{d}$
As, $\lambda$ and $d$ are constants.
$	herefore \quad Z \propto D$
So, the graph between $Z$ and $D$ will be a straight line inclined to D-axis, as shown in graph (C).

Answer

A

Answer

B

Answer

D

Answer

C

Wave Optics

A graph is plotted between the fringe-width Z and the distance D between the slit and eye-piece, keeping other adjustment same. The correct graph is (A) (B) (C) (D)

Choose the correct answer: