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Refraction and Total Internal Reflection for NEET: 25 solved questions

Real NEET paper questions on refraction and total internal reflection, part of ray optics and optical instruments. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 1989 to 2023. No sign-in needed to read them.

What this topic asks

• Snell's law, slabs and apparent depth — 13 questions
• Total internal reflection and optical fibres — 12 questions

All 25 questions with solutions

• ε₀ and μ₀ are the electric permittivity and magnetic permeability of free space respectively. If the correspo… NEET 2023 Manipur
• Which set of colors will come out in air for a situation shown in the figure? NEET 2023 Manipur
• Light travels a distance x in time t₁ in air and 10x in time t₂ in another denser medium. What is the critica…
• A light ray falls on a glass surface of refractive index √3, at an angle 60°. The angle between the refracted… NEET 2022
• Two transparent media A and B are separated by a plane boundary. The speed of light in those media are 1.5×10… NEET 2022
• Ray optics is valid, when characteristic dimensions are CBSE AIPMT 1989
• If the critical angle for total internal reflection from a medium to vacuum is 45°, then velocity of light in… NEET 2020
• In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media… NEET 2019
• An air bubble in a glass slab with refractive index 1.5 (near normal incidence) is 5 cm deep when viewed from… NEET 2016
• A beam of light consisting of red, green and blue colours is incident on a right angled prism, as shown in th… AIPMT 2015
• Which of the following is not due to total internal reflection? CBSE AIPMT 2011
• A ray of light travelling in a transparent medium of refractive index μ falls, on a surface separating the me… CBSE AIPMT 2010
• The frequency of a light wave in a material is 2×10¹⁴ Hz and wavelength is 5000 Å. The refractive index of ma… CBSE AIPMT 2007
• A small coin is resting on the bottom of a beaker filled with a liquid. A ray of light from the coin travels… CBSE AIPMT 2007
• A beam of light composed of red and green rays is incident obliquely at a point on the face of a rectangular… CBSE AIPMT 2004
• Transmission of light in optical fibre is due to CBSE AIPMT 2001
• A transparent cube contains a small air bubble. Its apparent distance is 2 cm when seen through one face and… CBSE AIPMT 2000
• Light enters at an angle of incidence in a transparent rod of refractive index μ. For what value of the refra… CBSE AIPMT 1998
• Electromagnetic radiation of frequency u, velocity v and wavelength λ, in air, enters a glass slab of refract… CBSE AIPMT 1997
• One face of a rectangular glass plate 6 cm thick is silvered. An object held 8 cm in front of the first face,… CBSE AIPMT 1996
• Light travels through a glass plate of thickness t and refractive index μ. If c is the speed of light in vacu… CBSE AIPMT 1996
• A point source of light is placed 4 m below the surface of water of refractive index 5/3. The minimum diamete… CBSE AIPMT 1994
• Time taken by sunlight to pass through a window of thickness 4 mm whose refractive index is 3/2, is CBSE AIPMT 1993
• A beam of monochromatic light is refracted from vacuum into a medium of refractive index 1.5. The wavelength… CBSE AIPMT 1991
• A microscope is focussed on a mark on a piece of paper and then a slab of glass of thickness 3 cm and refract… CBSE AIPMT 2006