State laws of refraction. Explain absolute refractive index of a medium. Is there a medium with refractive index less than one. why?
Answers
Answer:
PHYSICS
State the laws of refraction of light. Explain the term 'absolute refractive index of a medium' and write an expression to relate it with the speed of light in vacuum.
October 15, 2019
avatar
Kanchan Moirangthem
Share
Save
VIDEO EXPLANATION
ANSWER
Snell's laws of refraction of light :
(1) : The incident ray, refracted ray and normal to the refracted surface lie in same plane.
(2) : Ratio of sine of angle of incidence in medium 1 to that of angle of refraction in medium 2 is equal to the ratio of refractive index of medium 2 to that of 1.
⟹
sinr
sini
=
n
2
n
2
Absolute refractive index of the medium is defined as the refractive index of that medium with respect to refractive index of vacuum i.e. ratio of refractive index of the given medium to that of vacuum.
Absolute refractive index of medium =
n
vacuum
n
medium
=
v
c
where v is the speed of light in that medium, c is the speed of light in vacuum
please mark me as a brainalist