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Light

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Total cards: 14•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (14)

#1
Front (Question)

second law of reflection

Back (Answer)

angle of incidence i is equal to angle of reflection r (i=r)

#2
Front (Question)

normal in reflection

Back (Answer)

perpendicular line to reflecting surface of point of incidence

#3
Front (Question)

angle of incidence

Back (Answer)

angle between incident ray and normal

#4
Front (Question)

angle of reflection

Back (Answer)

angle between reflected ray and normal

#5
Front (Question)

refraction is meant by

Back (Answer)

the bending of light as it passes from one optical medium to another

#6
Front (Question)

normal in refraction

Back (Answer)

perpendicular line to medium interface (air-water interface)

#7
Front (Question)

angle of refraction

Back (Answer)

angle between normal and refracted ray

#8
Front (Question)

point of incidence in refraction

Back (Answer)

point at which an incident ray strikes surface

#9
Front (Question)

what is meant by refractive index?

Back (Answer)

ratio of speed of light in vacuum to speed of light in medium

#10
Front (Question)

refractive index for speed

Back (Answer)

c/v

#11
Front (Question)

refractive index for angle

Back (Answer)

sin i/sin r

#12
Front (Question)

when does total internal reflection occur?

Back (Answer)

• when light is travelling from optically denser medium to optically less dense medium • angle of incidence in optically denser medium must be larger than critical angle

#13
Front (Question)

critical angle definition

Back (Answer)

the angle of incidence in an optically denser medium for which the angle of refraction in the less dense medium is 90.

#14
Front (Question)

focal length

Back (Answer)

the distance between optical centre and focal point