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Saturday, 31 October

JEE Main · Physics · Dual Nature of Radiation and Matter

Wavelength Ratios of Different Particles

JEE Main asked Wavelength Ratios of Different Particles 15 times in 15 of the 108 shifts Lumi analysed, in 2020, 2021, 2022, 2023, 2024 and 2026. It belongs to Matter Waves, in Dual Nature of Radiation and Matter (Physics). The longest wait between two years asking it was 2 years. In 2021, 2022 and 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
15
in 15 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.

00.150.30’170.08’200.24’210.10’220.07’230.09’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 7 in 24 shifts · 2022: 3 in 24 shifts · 2023: 1 in 12 shifts · 2024: 2 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
  • 20242 of 18
  • 20231 of 12
  • 20223 of 24
  • 20217 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.

  • Ratio of de broglie wavelengths
  • Order/ranking of de broglie wavelengths

Difficulty

Easy 11Medium 4Hard 0

Every question was multiple choice.

Every question

All 15 questions

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

  1. 4 Apr 2026, Shift 2 · Q44The de Broglie wavelength associated with an electron accelerated through a potential difference V is λe\lambda_e and the de Broglie…EasySingle correct
  2. 1 Feb 2024, Shift 1 · Q46The de Broglie wavelengths of a proton and an α\alpha particle are λ\lambda and 2λ2\lambda respectively. The ratio of the velocities of…EasySingle correct
  3. 8 Apr 2024, Shift 2 · Q46A proton and an electron have the same de Broglie wavelength. If KpK_p and KeK_e be the kinetic energies of proton and electron…EasySingle correct
  4. 11 Apr 2023, Shift 2 · Q45The ratio of the de-Broglie wavelengths of proton and electron having same Kinetic energy : (Assume mp=me×1849\mathrm{m_p = m_e\times1849})EasySingle correct
  5. 27 Jun 2022, Shift 1 · Q43An α\alpha particle and a carbon 12 atom has same kinetic energy K. The ratio of their de-Broglie wavelengths…EasySingle correct
  6. 25 Jun 2022, Shift 2 · Q46A proton, a neutron, an electron and an α\alpha-particle have same energy. If λp,λn,λe\lambda_p, \lambda_n, \lambda_e and λα\lambda_\alpha are…MediumSingle correct
  7. 25 Jul 2022, Shift 2 · Q37The ratio of wavelengths of proton and deuteron accelerated by potential Vp\mathrm{V_p} and Vd\mathrm{V_d} is 1:21:\sqrt{2}. Then, the…EasySingle correct
  8. 18 Mar 2021, Shift 2 · Q7The speed of electrons in a scanning electron microscope is 1×1071\times10^7 ms−1^{-1}. If the protons having the same speed are used instead…MediumSingle correct
  9. 18 Mar 2021, Shift 1 · Q8A particle is travelling 4 times as fast as an electron. Assuming the ratio of de-Broglie wavelength of a particle to that of electron is…EasySingle correct
  10. 16 Mar 2021, Shift 2 · Q2The de-Broglie wavelength associated with an electron and a proton were calculated by accelerating them through same potential of 100 V.…MediumSingle correct
  11. 25 Feb 2021, Shift 2 · Q15An electron of mass mem_e and a proton of mass mp=1836 mem_p = 1836\ m_e are moving with the same speed. The ratio of their de Broglie wavelength…EasySingle correct
  12. 25 Feb 2021, Shift 1 · Q12An α\alpha particle and a proton are accelerated from rest by a potential difference of 200 V. After this, their de Broglie wavelengths…EasySingle correct
  13. 24 Feb 2021, Shift 2 · Q16The de Broglie wavelength of a proton and α\alpha-particle are equal. The ratio of their velocities is :EasySingle correct
  14. 31 Aug 2021, Shift 1 · Q4A moving proton and electron have the same de-Broglie wavelength. If K and P denote the K.E. and momentum respectively. Then choose the…EasySingle correct
  15. 2 Sep 2020, Shift 2 · Q17A particle is moving 5 times as fast as an electron. The ratio of the de-Broglie wavelength of the particle to that of the electron is…MediumSingle correct

Shifts: 2 Sep 2020, Shift 2, 24 Feb 2021, Shift 2, 25 Feb 2021, Shift 2, 25 Feb 2021, Shift 1, 16 Mar 2021, Shift 2, 18 Mar 2021, Shift 2, 18 Mar 2021, Shift 1, 31 Aug 2021, Shift 1, 25 Jun 2022, Shift 2, 27 Jun 2022, Shift 1, 25 Jul 2022, Shift 2, 11 Apr 2023, Shift 2, 1 Feb 2024, Shift 1, 8 Apr 2024, Shift 2, 4 Apr 2026, Shift 2.

Same topic

Other ideas in Matter Waves

Matter Waves has 20 ideas JEE Main has asked; 9 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas