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Saturday, 31 October

JEE Main · Physics · Atoms

Rydberg Formula and Spectra

JEE Main asked Rydberg Formula and Spectra 10 times in 9 of the 108 shifts Lumi analysed, in 2020, 2021, 2022, 2023, 2024 and 2026. It belongs to Bohr's Atomic Model, in Atoms (Physics). The longest wait between two years asking it was 2 years. In 2021 and 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
10
in 9 shifts
Years
6 of 8
First asked
2020
last in 2026
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022, 2023, 2024 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170.08’200.10’210.10’220.07’230.05’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 3 in 24 shifts · 2022: 3 in 24 shifts · 2023: 1 in 12 shifts · 2024: 1 in 18 shifts · 2025: 0 in 8 shifts · 2026: 1 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20261 of 9
  • 20250 of 8
  • 20241 of 18
  • 20231 of 12
  • 202222 of 24
  • 20213 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: calculation.

  • Wavelength of hydrogen transition
  • Ratio of wavelengths of hydrogen spectral lines

Difficulty

Easy 6Medium 4Hard 0

4 of the 10 questions had a numerical answer.

Every question

All 10 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 5 Apr 2026, Shift 1 · Q36In the hydrogen atom, the electron makes a transition from the higher orbit (ii) to a lower orbit (ff). The ratio of the radius of the…EasySingle correct
  2. 31 Jan 2024, Shift 1 · Q47If the wavelength of the first member of Lyman series of hydrogen is λ\lambda. The wavelength of the second member will beEasySingle correct
  3. 15 Apr 2023, Shift 1 · Q56As per given figure A, B and C are the first, second and third excited energy levels of hydrogen atom respectively. If the ratio of the…MediumNumerical valueHas a figure
  4. 26 Jul 2022, Shift 1 · Q59In the hydrogen spectrum, λ\lambda be the wavelength of first transition line of Lyman series. The wavelength difference will be…MediumNumerical value
  5. 25 Jul 2022, Shift 2 · Q50Hydrogen atom from excited state comes to the ground state by emitting a photon of wavelength λ\lambda . The value of principal quantum…MediumSingle correct
  6. 25 Jul 2022, Shift 2 · Q54xx+4\frac{x}{x+4} is the ratio of energies of photons produced due to transition of an electron of hydrogen atom from its (i) third…EasyNumerical value
  7. 26 Feb 2021, Shift 1 · Q19If λ1\lambda_1 and λ2\lambda_2 are the wavelengths of the third member of Lyman and first member of the Paschen series respectively, then…MediumSingle correct
  8. 25 Feb 2021, Shift 2 · Q16The wavelength of the photon emitted by a hydrogen atom when an electron makes a transition from n = 2 to n = 1 state is :EasySingle correct
  9. 26 Aug 2021, Shift 1 · Q5A particular hydrogen like ion emits radiation of frequency 2.92×10152.92\times10^{15} Hz when it makes transition from n=3 to n=1. The frequency…EasySingle correct
  10. 8 Jan 2020, Shift 2 · Q25The first member of the Balmer series of hydrogen atom has a wavelength of 6561 A˚6561\ \mathrm{\AA}. The wavelength of the second member of…EasyNumerical value

Shifts: 8 Jan 2020, Shift 2, 25 Feb 2021, Shift 2, 26 Feb 2021, Shift 1, 26 Aug 2021, Shift 1, 25 Jul 2022, Shift 2, 26 Jul 2022, Shift 1, 15 Apr 2023, Shift 1, 31 Jan 2024, Shift 1, 5 Apr 2026, Shift 1.

Same topic

Other ideas in Bohr's Atomic Model

Bohr's Atomic Model has 22 ideas JEE Main has asked; 13 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas