Geometrical OpticsMedium
Question
A ray of light travelling in a transparent medium of refractive index μ, falls on a surfaces parting the medium from the air at an angle of incidence of 45o . For which of the following value of μ the ray can undergo total internal reflection?
Options
A.μ = 1.33
B.μ = 1.40
C.μ = 1.50
D.μ = 1.25
Solution
For total internal reflection,
sin i > sin C
where,
i = angle of incidence
C = critical angle
But, sin C =
∴ sin i > or μ > 
μ >
(i = 45o(Given))
μ > √2
Hence, option (c) is correct.
sin i > sin C
where,
i = angle of incidence
C = critical angle
But, sin C =
∴ sin i >
or μ > μ >
(i = 45o(Given))μ > √2
Hence, option (c) is correct.
Create a free account to view solution
View Solution FreeMore Geometrical Optics Questions
An object 5 cm tall is placed 1 m from a concave spherical mirror which has a radius of curvature of 20 cm. The size of ...I is the image of a point object O formed by spherical mirror then which of the following statement(s) is/ are CORRECT?...A prism of angle $75^{\circ}$ and refractive index $\sqrt{3}$ is coated with thin film of refractive index 1.5 only at t...A person can see clearly only upto a distance of 25 cm. He wants to read a book placed at a distance of 50 cm. What kind...A person′s near point is 50 cm and his far point is 3 m. Power of the lenses he requires for- (i) reading and (ii)...