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Friday, 9 October

NEET UG 2026 · Physics · Question 19

NEET 2026 Physics, question 19

Question 19 of the NEET 2026 paper (re-exam) 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

Q19 · Physics

A 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 pPhp_{Ph}, pepPh\frac{p_e}{p_{Ph}} is :

(Take speed of light = 3×1083\times10^8 ms−1^{-1}, charge of electron = −1.6×10−19-1.6\times10^{-19} C and mass of electron = 9×10−319\times10^{-31} kg)

  1. 12450\frac{2}{450}
  2. 21250\frac{1}{250}
  3. 3225Official answer
  4. 4275

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.

  • 2025 Q37A photon and an electron (mass mm) have the same energy EE. The ratio (λphoton/λelectron\lambda_{photon}/\lambda_{electron}) of their de Broglie…One-line MCQ · 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