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Friday, 9 October

NEET UG 2024 · Physics · Question 14

NEET 2024 Physics, question 14

Question 14 of the NEET 2024 paper (code T2) is a Physics question from Ray Optics and Optical Instruments. Its idea, Grazing Emergence Condition, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 4.

Updated 2026-10-08

Q14 · Physics

A light ray enters through a right angled prism at point PP with the angle of incidence 30° as shown in figure. It travels through the prism parallel to its base BCBC and emerges along the face ACAC. The refractive index of the prism is:

The figure, described in words

Right-angled prism ABC (right angle at B, base BC); ray enters face AB at P at 30° incidence, travels parallel to BC and emerges grazing along face AC.

  1. 134\frac{\sqrt{3}}{4}
  2. 232\frac{\sqrt{3}}{2}
  3. 354\frac{\sqrt{5}}{4}
  4. 452\frac{\sqrt{5}}{2}Official answer

Official answer: option 4 · NTA final answer key

Same idea

The only question on Grazing Emergence Condition

No other NEET paper from 2017–2026 tested this exact idea.

Grazing Emergence Condition: 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.

Ray Optics and Optical Instruments: questions per paper

0242’173’183’191’204’213’223’232’242’253’26