A ray of light travelling in a transparent medium of refractive index µ, falls on surface

A ray of light travelling in a transparent medium of refractive index µ, falls on surface seperating the medium from air at an angle of incidence of 45⁰. 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

Correct Answer:

µ = 1.50

Explanation:

For the initial reflection,
µ >= 1 / sin C >= √2 >= 1.414
µ = 1.50

admin:

Related Questions

  1. Current flows in semi-conductors through
  2. A point charge is kept at the centre of a metallic insulated spherical shell. Then
  3. An amplifier has a voltage gain Av=1000. The voltage gain in dB is
  4. If a steel wire of length l and magnetic moment M is bent into a semicircular arc,
  5. A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV.