Student Login

Home›Chapters›Wave Optics PYQs›YDSE: Fringe Width & Fringe Positions›Question 56

MHT CET 2021 (21 Sep, Shift 2) · YDSE: Fringe Width & Fringe Positions

YDSE: Fringe Width & Fringe Positions question from MHT CET 2021 (21 Sep, Shift 2)

Q56MHT CET 2021 · 21 SEP · SHIFT 2Medium

YDSE: Fringe Width & Fringe Positions

In Young's experiment, fringes are obtained on a screen placed at a distance $75\text{ cm}$ from the slits. When the separation between two narrow slits is doubled, then the fringe width is decreased. In order to obtain the initial fringe width, the screen should be moved through.

Show answer and solution

Answer: (c)

$\beta = \frac{\lambda D}{d}$ ; to keep $\beta$ fixed when $d \to 2d$ , need $D \to 2D$
$D' = 2 \times 75 = 150$ cm, so the screen moves $150 - 75 = 75$ cm
So the answer is (c) $75$ cm away from the slits.

Report a mistake

More questions on YDSE: Fringe Width & Fringe Positions

In the Young's double slit experiment, the distance between the slits varies in time as…JEE Main 2021 (25 Jul, Shift 1)
In a Young's double slit experiment, the slits are separated by 0.3 mm and the screen is…JEE Main 2021 (31 Aug, Shift 2)
White light is passed through a double slit and interference is observed on a screen 1.5…JEE Main 2021 (26 Aug, Shift 1)
In Young's double slit experiment green light is incident on the two slits. The…MHT CET 2020 (16 Oct, Shift 1)
In Young's double slit experiment, if the separation between coherent sources is halved…NEET 2020 (Phase 1)
In a Young’s double slit experiment, 16 fringes are observed in a certain segment of the…JEE Main 2020 (2 Sep, Shift 2)
In a Young's double slit experiment 15 fringes are observed on a small portion of the…JEE Main 2020 (9 Jan, Shift 2)
In a Young’s double slit experiment, light of 500 nm is used to produce an interference…JEE Main 2020 (3 Sep, Shift 1)