Learn

Friday, 9 October

JEE Main Physics · Ray Optics and Optical Instruments

Total Internal Reflection

Total Internal Reflection (Ray Optics and Optical Instruments) was asked 6 times in 6 JEE Main shifts, 2020–2025, out of the 42 shifts Lumi analysed.

Times asked
6
in 6 shifts
Years
2020–2025
Usual format
Single correct
Application
Pattern
Asked most years
repeats across shifts

How it is asked

  • Maximum incidence angle for total internal reflection
  • Condition for total internal reflection

Difficulty

Easy 3Medium 2Hard 1

Where it sits

Chapter: Ray Optics and Optical Instruments. Topic: Refraction and Snell's Law, 15 questions over 8 ideas.

Other repeat ideas in this topic

Every time it came

All 6 questions

Newest first, each with its options and official answer.

  1. 7 Apr 2025, Shift 2 · Q42A transparent block A having refractive index μ=1.25\mu=1.25 is surrounded by another medium of refractive index μ=1.0\mu=1.0 as shown in figure.…MediumSingle correctHas a figure
  2. 8 Apr 2024, Shift 1 · Q43Critical angle of incidence for a pair of optical media is 45∘45^\circ. The refractive indices of first and second media are in the ratio:EasySingle correct
  3. 11 Apr 2023, Shift 1 · Q35The critical angle for a denser-rarer interface is 45∘45^\circ. The speed of light in rarer medium is 3×1083 \times 10^8 m/s. The speed of…EasySingle correct
  4. 25 Jul 2021, Shift 1 · Q9A ray of laser of a wavelength 630 nm is incident at an angle of 30∘30^\circ at the diamond-air interface. It is going from diamond to air.…EasySingle correct
  5. 8 Jan 2020, Shift 1 · Q15The critical angle of a medium for a specific wavelength, if the medium has relative permittivity 3 and relative permeability…MediumSingle correct
  6. 9 Jan 2020, Shift 2 · Q17There is a small source of light at some depth below the surface of water (refractive index =43= \frac{4}{3}) in a tank of large cross…HardSingle correct