In prism, r1+c=A r1=90∘−c…(1)sinc=μ1⇒cosc=μμ2−1 ⇒ Apply Snell's law, on incidence surface 1⋅sin30∘=μsin(r1)⇒1×2121=μ×sin(90∘−c)=μ×μμ2−1 On squaring 41=μ2−1 ⇒μ2=45⇒μ=25
NEET UG 2024 — Physics Optics
2024mcqhard
A light ray enters through a right angled prism at point P with the angle of incidence 30∘ as shown in figure. It travels through the prism parallel to its base BC and emerges along the face AC. The refractive index of the prism is: 
Official previous-year question
Held on 30 Apr 2024 · Verified 9 Jul 2026.
Options
- A
25
- B
43
- C
23
- D
45
Did you get this right?
Sign in to track your attempts and accuracy.
Your note
Sign in to keep a private note on this question. Nothing you write is ever public.
NEET UG Optics in other years
More NEET UG Optics questions
The refractive index of glass is 1.5. The speed of light in glass is:
2026easy
Two thin lenses of focal lengths f₁ = +20 cm and f₂ = -10 cm are in contact. The power of the combination is:
2026easy
In a certain camera, a combination of four similar thin convex lenses are arranged axially in contact. Then the power of the combination and the total magnification in comparison to the power $(p)$ and magnification $(m)$ for each lens will be, respectively
2025medium
The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at $22.5^{\circ}$ from the polarization axis of one of the polaroid, is ( $\mathrm{I}_0$ is the intensity of polarised light after passing through the first polaroid):
2025medium
A microscope has an objective of focal length 2 cm , eyepiece of focal length 4 cm and the tube length of 40 cm . If the distance of distinct vision of eye is 25 cm , the magnification in the microscope is :
2025medium
Other Physics topics for NEET UG
Keep practicing Optics
Work through every NEET UG Optics PYQ, year by year.