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Friday, 9 October

NEET UG 2025 · Physics · Question 37

NEET 2025 Physics, question 37

Question 37 of the NEET 2025 paper (code 45) is a Physics question from Dual Nature of Radiation and Matter. Its idea, Photon Momentum and Effective Mass, was asked 3 times, in 2024, 2025 and 2026, across NEET 2017–2026. The NTA final answer key gives option 3.

Updated 2026-10-08

Q37 · Physics

A photon and an electron (mass mm) have the same energy EE. The ratio (λphoton/λelectron\lambda_{photon}/\lambda_{electron}) of their de Broglie wavelengths is: (cc is the speed of light)

  1. 1E2m\sqrt{\frac{E}{2m}}
  2. 2c2mEc\sqrt{2mE}
  3. 3c2mEc\sqrt{\frac{2m}{E}}Official answer
  4. 41cE2m\frac{1}{c}\sqrt{\frac{E}{2m}}

Official answer: option 3 · NTA final answer key

Same idea

Photon Momentum and Effective Mass, in other papers

NEET asked this idea 3 times, in 2024, 2025 and 2026. The other 2 questions below.

  • 2026 Q19A photon and an electron, each of 20 eV energy, move in free space. The ratio of linear momentum of electron pep_e to that of photon…Numerical · Medium
  • 2024 Q10If cc is the velocity of light in free space, the correct statements about photon among the following are : A. The energy of a photon is…Other · Easy

Photon Momentum and Effective Mass: every question and how it was framed

The chapter

Dual Nature of Radiation and Matter in ten years of NEET

20 questions from 2017–2026, asked in 10 of 10 papers, about 1.9 a paper. Photoelectric Effect alone had 20.

Chapter analysisStudy this chapterPractise this chapter

Dual Nature of Radiation and Matter: questions per paper

0241’172’181’193’202’212’222’232’242’253’26