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Refraction

32 PYQ across 5 exams · 1988–2025 — the complete chronological timeline of how UPSC has tested this idea, oldest to newest.

CSE 1988 → CDS 2014 → … → GEO 2021
19881 PYQ
CSEQ27
The phenomenon of mirage is due to…
19911 PYQ
CSEQ36
The rainbow and the rainbow-like colors seen on a thin film of oil on a water surface are two phenomena. They are…
20131 PYQ
CSEQ90
Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this? 1. Dispersion …
20142 PYQs
CDSQ1
The upper and lower portions in common type of bi-focal lenses are respectively…
CDSQ4
In the phenomenon of dispersion of light, the light wave of shortest wavelength is…
20161 PYQ
CDSQ37
In total internal reflection, the light travels from…
20171 PYQ
CAPFQ3
Statement I: Occasionally we see two rainbows together, the primary rainbow with another less intense secondary rainbow about 10 degrees awa…
20203 PYQs
CDSQ90
If the speed of light in air is represented by c and the speed in a medium is v, then the refractive index of the medium can be calculated u…
CDSQ103
When a light ray enters into glass medium from water at an angle of incidence 0°, what would be the angle of refraction?…
NDAQ87
A lemon kept in water in a glass tumbler appears to be larger than its actual size. It is because of…
202111 PYQs
CDSQ1
Where should an object be placed in front of a convex lens to get a real and enlarged image of the object?…
CDSQ3
A ray of light travelling from a rarer medium to a denser medium…
CDSQ21
Refraction of light, as it enters one transparent medium to another, is due to…
GEOQ64
A ray of light strikes a glass slab (from air). Which one of the following is NOT correct?…
NDAQ146
Which one of the following figures correctly shows the path of a ray of light through a glass prism ?…
NDAQ147
When a light beam falls on a triangular glass prism, a band of colours is obtained. Which one of the following statements is correct in this…
NDAQ75
Which one of the following statements is not correct for light rays ?…
NDAQ76
A glass prism splits white light into different colours. This phenomenon is called dispersion of light by prism. Which one of the following …
NDAQ92
Light waves are incident on an air-glass boundary. Some of the light waves are reflected and some are refracted in the glass. Which one of t…
NDAQ98
If a ray of light enters from a rarer to a denser medium at zero angle of incidence, it would…
NDAQ99
Mirage is an illustration of…
20223 PYQs
CAPFQ22
Which one of the following materials cannot be used to make a convex lens?…
GEOQ87
The appearance of a rainbow in the sky after a rain shower is due to…
GEOQ88
On a very hot day, we often see shimmering wavy lines near the ground. It is due to…
20233 PYQs
CDSQ1
A person can see near objects clearly through his eyes but cannot see distant objects clearly. The possible reason(s) for this defect could …
CDSQ38
Which one of the following statements is correct regarding the travel of a light beam from a rare to a dense medium ?…
NDAQ148
In the dispersion of white light by a common glass prism, which one among the following is correct?…
20243 PYQs
CDSQ23
The phenomenon of rainbow formation by water droplets involves :…
GEOQ25
An electromagnetic wave E = E0 e^(ik(2x + 4y) − ωt) travelling in air is incident on the x − z plane of a glass slab. The glass slab has a r…
NDAQ129
Which of the following statements with regard to the phenomenon of the primary rainbow formation by water droplets is/are correct? 1. It inv…
20252 PYQs
CDSQ29
Twinkling of a star is due to :…
GEOQ18
A glass bar (refractive index = 1·5) is immersed in a liquid having the same refractive index as that of glass. The angle of incidence for a…
Related concepts — explore their timelines too
OpticsDispersion of lightTotal internal reflectionDispersionRefractive indexTotal Internal ReflectionInterferenceLensesLightHuman eye
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