If the critical angle for total internal reflection from a medium to vacuum is 30°, the velocity of light in the
medium is
[ ]
Answers
Answered by
4
Answer:
Critical angle for total internal reflection θ
c
=30
o
As we know, refractive index of air medium n
air
=1
Refractive index of the medium n=
sinθ
c
1
∴ n=
sin30
o
1
=
0.5
1
⟹ n=2
Velocity of light in medium v=
n
c
∴ v=
2
3×10
8
=1.5×10
8
m/s
Answered by
11
Answer:
▪︎Critical angle for total internal reflection θc =30°
As we know, refractive index of air medium n
air = 1
Refractive index of the medium n= 1/sinθc
∴ n= 1/sin30° = 1/0.5
⟹ n=2
▪︎Velocity of light in medium v = c/n
∴ v = 3×10⁸/2
=1.5×10 m/s
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