JEE Main 2023 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 8 April 2023, Shift 2, Physics Q46

Question 46 of 90 in this shift, Physics question 16 of 30, Section A.

The width of fringe is 2 mm on the screen in a double slits experiment for the light of wavelength of 400 nm. The width of the fringe for the light of wavelength 600 nm will be:

(1)2 mm
(2)3 mmOfficial answer
(3)4 mm
(4)1.33 mm

Official answer

Option 2

NTA final key.

Chapter: Wave Optics
Topic: Young's Double Slit
Idea tested: YDSE Fringe Width

Same idea in other shifts

Asked 7× in all

28 Jul 2022, Shift 1 · Q53In a Young's double slit experiment, a laser light of 560 nm produces an interference pattern with consecutive bright fringes' separation…EasyNumerical value
29 Jun 2022, Shift 1 · Q49Using Young's double slit experiment, a monochromatic light of wavelength 5000 $\mathrm{\AA}$ produces fringes of fringe width 0.5 mm. If…EasySingle correct
3 Aug 2021, Shift 2 · Q27In Young's double slit experiment, 58 fringes are observed in the field of view when a light of wavelength 6000 $\mathrm{\AA}$ was used.…EasyNumerical value
25 Jul 2021, Shift 1 · Q8In the Young's double slit experiment, the distance between the slits varies in time as $d(t)=d_0+a_0\sin\omega t$ ; where $d_0$ , $\omega$ …MediumSingle correct
18 Mar 2021, Shift 1 · Q7In Young's double slit arrangement, slits are separated by a gap of 0.5 mm, and the screen is placed at a distance of 0.5 m from them. The…EasySingle correct
9 Jan 2020, Shift 2 · Q24In a Young's double slit experiment 15 fringes are observed on a small portion of the screen when light of wavelength 500 nm is used. Ten…EasyNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.