JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 29 June 2022, Shift 1, Physics Q49

Question 49 of 90 in this shift, Physics question 19 of 30, Section A.

Using Young's double slit experiment, a monochromatic light of wavelength 5000

\mathrm{\AA}

produces fringes of fringe width 0.5 mm. If another monochromatic light of wavelength 6000

\mathrm{\AA}

is used and the separation between the slits is doubled, then the new fringe width will be :

(1)0.5 mm
(2)1.0 mm
(3)0.6 mm
(4)0.3 mmOfficial answer

Official answer

Option 4

NTA final key (2022 Session 1).

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

Same idea in other shifts

Asked 7× in all

8 Apr 2023, Shift 2 · Q46The 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…EasySingle correct
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
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.