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Saturday, 31 October

JEE Main · Physics · Electromagnetic Waves

Thermal Radiation Pressure

JEE Main asked Thermal Radiation Pressure 3 times in 3 of the 108 shifts Lumi analysed, in 2022, 2024 and 2025. It belongs to Thermal Radiation, in Electromagnetic Waves (Physics). The longest wait between two years asking it was 2 years.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
3 of 8
First asked
2022
last in 2025
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2022, 2024 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170’200’210.03’220’230.05’240.13’250’26

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

Shift by shift

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

  • 20260 of 9
  • 20251 of 8
  • 20241 of 18
  • 20230 of 12
  • 20221 of 24
  • 20210 of 24
  • 20200 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.

  • Radiation pressure from source power
  • Area from radiation force and flux

Difficulty

Easy 0Medium 3Hard 0

Every question was multiple choice.

Every question

All 3 questions

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

  1. 3 Apr 2025, Shift 1 · Q40The radiation pressure exerted by a 450 W light source on a perfectly reflecting surface placed at 2m away from it, isMediumSingle correct
  2. 8 Apr 2024, Shift 1 · Q42Average force exerted on a non-reflecting surface at normal incidence is 2.4×10−42.4\times10^{-4} N. If 360 W/cm2^2 is the light energy flux…MediumSingle correct
  3. 28 Jul 2022, Shift 2 · Q15Sun light falls normally on a surface of area 36 cm236\ \mathrm{cm^2} and exerts an average force of 7.2×10−97.2\times10^{-9} N within a time period…MediumSingle correct

Shifts: 28 Jul 2022, Shift 2, 8 Apr 2024, Shift 1, 3 Apr 2025, Shift 1.

Same topic

Other ideas in Thermal Radiation

Thermal Radiation has 5 ideas JEE Main has asked; 4 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas