if the refractive index for a light ray going from air to glass is x , what is the refractive index for the light ray going from glass to air
Answers
Explanation:
it is 3/2 for glass. it cannot be inverse when the direction changes, because it is never smaller than 1. And for the reasons described above.” see David’s answer
The snell’s law is a relation between sine of the angle of incidence and angle of refraction. thus if the angle of refraction is smaller than the angle of incidence
the refractive index is greater than one; the index depends on the two media, therefore, the rays when coming out from glass to air will move away from the normal and thus the angle of refraction will be larger than the angle of incidence and thus the refractive index will be less than one.
there is a popular relation
Air ( refr. Index) glass = 3/2 = 1 / ( glass (ref. Index) Air)
so, glass (refr. Index) Air = 2/3 = 0.66
Answer:
A ray of light is going from air to glass angle of refraction inside the glass
90°=θ
r
+θ
d
Since θ
r
=θ
d
θ
r
= angle of refraction inside the glass
θ
d
= angle of deviation inside the glass
∴90°=2θ
r
θ
r
=45°
μ=
sin45°
sinθ
i
μ=
1/
2
2
/3
=
3
4
(θ
i
=60°)
Using Brewster's law
tan(θ
p
)=
n
1
n
2
μ=tanip
μ=
sinir
sinip
