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Saturday, 31 October

JEE Main · Physics · Dual Nature of Radiation and Matter

Basic Wavelength-Momentum Relation

JEE Main asked Basic Wavelength-Momentum Relation 5 times in 5 of the 108 shifts Lumi analysed, in 2020, 2021, 2022, 2023 and 2026. It belongs to Matter Waves, in Dual Nature of Radiation and Matter (Physics). The longest wait between two years asking it was 3 years.

Updated 2026-10-24

Times asked
5
in 5 shifts
Years
5 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 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170.08’200.03’210.03’220.07’230’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 1 in 24 shifts · 2022: 1 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 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
  • 20240 of 18
  • 20231 of 12
  • 20221 of 24
  • 20211 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.

  • De broglie wavelength ratio from velocity change
  • Momentum ratio for equal wavelength

Difficulty

Easy 4Medium 1Hard 0

2 of the 5 questions had a numerical answer.

Every question

All 5 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 2 · Q43An electron is travelling with a velocity vv in free space and when it enters a medium, its velocity is reduced by 20%. The de Broglie…EasySingle correct
  2. 8 Apr 2023, Shift 1 · Q44Proton (P) and electron (e) will have same de-Broglie wavelength when the ratio of their momentum is (assume,…EasySingle correct
  3. 26 Jul 2022, Shift 1 · Q83The wavelength of an electron and a neutron will become equal when the velocity of the electron is xx times the velocity of neutron. The…EasyNumerical value
  4. 4 Aug 2021, Shift 1 · Q52The wavelength of a tennis ball of mass 57 g travelling at 80 km h−1^{-1} is ________ ×10−34\times 10^{-34} m. (Nearest integer) [Use : h =…EasyNumerical value
  5. 4 Sep 2020, Shift 1 · Q18Particle A of mass mA=m2m_A=\frac{m}{2} moving along the xx-axis with velocity v0v_0 collides elastically with another particle B at rest…MediumSingle correct

Shifts: 4 Sep 2020, Shift 1, 4 Aug 2021, Shift 1, 26 Jul 2022, Shift 1, 8 Apr 2023, Shift 1, 5 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