NEET UG 2021 · Physics · Question 30
NEET 2021 Physics, question 30
Question 30 of the NEET 2021 paper (code O1) is a Physics question from Ray Optics and Optical Instruments. Its idea, Snell's Law Calculation, was asked twice, in 2018 and 2021, across NEET 2017–2026. The NTA final answer key gives option 3.
Updated 2026-10-08
Q30 · Physics
Find the value of the angle of emergence from the prism. Refractive index of the glass is .
The figure, described in words
Right-angled prism with 60° base angle; ray incident normally on the hypotenuse face (right-angle mark at incidence), emerging from another face.
- 145°
- 290°
- 360°Official answer
- 430°
Official answer: option 3 · NTA final answer key
Same idea
Snell's Law Calculation, in other papers
NEET asked this idea twice, in 2018 and 2021. The other question below.
- 2018 Q19The refractive index of the material of a prism is and the angle of the prism is 30°. One of the two refracting surfaces of the…Numerical · Medium
Snell's Law Calculation: 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.