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Friday, 9 October

JEE Main 2023 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 11 April 2023, Shift 1, Physics Q51

Question 51 of 90 in this shift, Physics question 21 of 30, Section B.

A monochromatic light is incident on a hydrogen sample in ground state. Hydrogen atoms absorb a fraction of light and subsequently emit radiation of six different wavelengths. The frequency of incident light is x×1015x \times 10^{15} Hz. The value of xx is ___________. (Given h=4.25×10−15h = 4.25 \times 10^{-15} eVs)

Official answer

3

NTA final key.

Chapter
Atoms
Topic
Bohr's Atomic Model
Idea tested
Number of Spectral Lines

Same idea in other shifts

Asked 2× in all
  1. 9 Apr 2024, Shift 2 · Q35A hydrogen atom in ground state is given an energy of 10.210.2 eV. How many spectral lines will be emitted due to transition of electrons ?EasySingle correct

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.