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Refractive index

10 PYQ across 4 exams · 1994–2026 — the complete chronological timeline of how UPSC has tested this idea, oldest to newest.

CSE 1994 → NDA 2020 → CDS 2020 → GEO 2022
19942 PYQs
CSEQ44
The speed of light will be minimum while passing tlrrough…
CSEQ48
The basic reason for the extraordinary sparkle of a suitably cut diamond is that…
20202 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…
NDAQ149
The refractive index of fused quartz is 1·46 and that of sapphire is 1·77. If vq is the speed of light in quartz and vs is the speed of ligh…
20222 PYQs
GEOQ94
The refractive index of a prism made of flint glass is…
NDAQ133
The refractive index of crown glass is close to 3/2. If the speed of light in air is c, then the speed of light in the crown glass will be c…
20252 PYQs
GEOQ1
An electromagnetic wave with its magnetic field B = 0.3cos(8y - 10^8 t) ĵ tesla is propagating in a non-magnetic dielectric medium of refrac…
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…
20262 PYQs
NDAQ68
A periscope uses two plane mirrors inclined at 45°. If the tube of the periscope is filled with a complete transparent liquid of refractive …
NDAQ74
A glass slab of refractive index 1·5 is cut in the shape of a parallelepiped ABCD as shown in the figure. Surface BC is polished to form a p…
Related concepts — explore their timelines too
Total internal reflectionRefractionDispersionSpeed of lightElectromagnetic wavesReflection
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