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Friday, 9 October

JEE Main Physics · Ray Optics and Optical Instruments

Refraction and Snell's Law in JEE Main

Refraction and Snell's Law (Physics, Ray Optics and Optical Instruments) came 15 times in 13 of the 42 JEE Main shifts Lumi analysed, across 8 distinct ideas. 8 of them came in 2024–26; it was last asked in 2026.

Questions
15
in 13 shifts
Ideas asked
8
3 asked more than once
Numerical answer
3
20% of its questions
Pattern
Asked most years
last asked 2026
Questions each year
0360’172’201’211’223’232’245’251’26

In the shifts Lumi analysed for each year.

Difficulty and format
Easy 6Medium 6Hard 3

Format

  • Single correct10 Q
  • Numerical value3 Q
  • Diagram based1 Q
  • Assertion–reason1 Q
Ideas inside the topic
8 ideas
Where it sits

Part of Ray Optics and Optical Instruments, which had 66 questions in all. Refraction and Snell's Law accounts for 23% of them. In Lumi's JEE taxonomy it belongs to Optics.

Some questions sit in other chapters too: Electromagnetic Waves, Wave Optics.

Every question

All 15 Refraction and Snell's Law questions

Newest first, each with its options and official answer.

  1. 8 Apr 2026, Shift 2 · Q42Light ray incident along a vector AO→\overrightarrow{AO} (AO→=2i^−3j^)\left(\overrightarrow{AO} = 2\hat{i} - 3\hat{j}\right) emerges out along vector…MediumDiagram basedHas a figure
  2. 3 Apr 2025, Shift 2 · Q42A monochromatic light of frequency 5×10145 \times 10^{14} Hz travelling through air, is incident on a medium of refractive index '2'.…EasySingle correct
  3. 4 Apr 2025, Shift 2 · Q47If an optical medium possesses a relative permeability of 10π\frac{10}{\pi} and relative permittivity of 10.0885\frac{1}{0.0885}, then the…MediumNumerical value
  4. 7 Apr 2025, Shift 1 · Q50A container contains a liquid with refractive index of 1.2 up to a height of 60 cm and another liquid having refractive index 1.6 is added…MediumNumerical value
  5. 7 Apr 2025, Shift 2 · Q41Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Refractive…EasyAssertion–reason
  6. 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
  7. 6 Apr 2024, Shift 2 · Q50In finding out refractive index of glass slab the following observations were made through travelling microscope 50 vernier scale division…HardSingle correct
  8. 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
  9. 6 Apr 2023, Shift 1 · Q36A monochromatic light wave with wavelength λ1\lambda_1 and frequency ν1\nu_1 in air enters another medium. If the angle of incidence and…EasySingle correct
  10. 6 Apr 2023, Shift 1 · Q52A pole is vertically submerged in swimming pool, such that it gives a length of shadow 2.15 m within water when sunlight is incident at an…HardNumerical value
  11. 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
  12. 25 Jul 2022, Shift 1 · Q46Time taken by light to travel in two different materials A and B of refractive indices μA\mu_A and μB\mu_B of same thickness is t1t_1 and…MediumSingle correct
  13. 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
  14. 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
  15. 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