JEE Main · Physics · Wave Optics
Failure of Classical Wave Theory
JEE Main asked Failure of Classical Wave Theory 2 times in 2 of the 108 shifts Lumi analysed, in 2022 and 2024. It belongs to Photoelectric Effect, in Wave Optics (Physics). The longest wait between two years asking it was 2 years.
Updated 2026-10-24
- Times asked
- 2
- in 2 shifts
- Years
- 2 of 8
- First asked
- 2022
- last in 2024
- Pattern
- Occasional
- across the analysed shifts
Questions on this idea a shift, by year
2017–2026. Asked in 2022 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.
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: 0 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.
How JEE Main framed it
Other is the usual form. Skill tested: conceptual.
- Phenomena not explained by wave nature of light
- Count correct statements on photoelectric effect
Difficulty
Every question was multiple choice.
Every question
All 2 questions
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
- 6 Apr 2024, Shift 1 · Q46Which of the following phenomena does not explain by wave nature of light. A. reflection B. diffraction C. photoelectric effect D.…EasySingle correct
- 27 Jul 2022, Shift 2 · Q47With reference to the observations in photo-electric effect, identify the correct statements from below : (A) The square of maximum…MediumOther
Shifts: 27 Jul 2022, Shift 2, 6 Apr 2024, Shift 1.
Same topic
Other ideas in Photoelectric Effect
Photoelectric Effect has 15 ideas JEE Main has asked; 13 of them came up in more than one question. The 12 most asked are below.
- Einstein's Photoelectric Equation14× · 2026
- Work Function and Threshold10× · 2025
- Two-Wavelength System of Equations7× · 2026
- Photon Flux and Beam Power7× · 2024
- Photon Energy and Momentum5× · 2026
- Stopping Potential4× · 2024
- Stopping Potential vs Frequency Graph4× · 2023
- Intensity vs Frequency Effects3× · 2024
- Comparative Graphs for Different Metals2× · 2026
- Solving via Two Wavelength Data Points2× · 2026
- K_max versus Frequency Graph2× · 2024
- Photoelectrons in a Magnetic Field2× · 2021