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Friday, 9 October

NEET UG 2022 · Physics · Question 47

NEET 2022 Physics, question 47

Question 47 of the NEET 2022 paper (code R1) is a Physics question from Ray Optics and Optical Instruments. Its idea, Critical Angle and TIR, was asked 3 times, in 2019, 2022 and 2023, across NEET 2017–2026. The NTA final answer key gives option 3.

Updated 2026-10-08

Q47 · Physics

Two transparent media A and B are separated by a plane boundary. The speed of light in those media are 1.5×1081.5\times10^{8} m/s and 2.0×1082.0\times10^{8} m/s, respectively. The critical angle for a ray of light for these two media is :

  1. 1tan⁡−1(0.750)\tan^{-1}(0.750)
  2. 2sin⁡−1(0.500)\sin^{-1}(0.500)
  3. 3sin⁡−1(0.750)\sin^{-1}(0.750)Official answer
  4. 4tan⁡−1(0.500)\tan^{-1}(0.500)

Official answer: option 3 · NTA final answer key

Same idea

Critical Angle and TIR, in other papers

NEET asked this idea 3 times, in 2019, 2022 and 2023. The other 2 questions below.

  • 2023 Q8Light travels a distance xx in time t1t_1 in air and 10x10x in time t2t_2 in another denser medium. What is the critical angle for this…Numerical · Medium
  • 2019 Q28In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be…One-line MCQ · Easy

Critical Angle and TIR: every question and how it was framed

The chapter

Ray Optics and Optical Instruments in ten years of NEET

26 questions from 2017–2026, asked in 10 of 10 papers, about 2.5 a paper. Snell's Law alone had 8.

Chapter analysisStudy this chapterPractise this chapter

Ray Optics and Optical Instruments: questions per paper

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