NEET UG 2019 · Physics · Question 28
NEET 2019 Physics, question 28
Question 28 of the NEET 2019 paper (code P1) 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 4.
Updated 2026-10-08
Q28 · Physics
In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction ?
- 1180°
- 20°
- 3equal to angle of incidence
- 490°Official answer
Official answer: option 4 · 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 in time in air and in time in another denser medium. What is the critical angle for this…Numerical · Medium
- 2022 Q47Two transparent media A and B are separated by a plane boundary. The speed of light in those media are m/s and…Numerical · Medium
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.