The critical angle for light going from medium A into medium B is θ. The speed of light in the medium A is VA. What is the speed of light in the medium B? (a) VA sin θ (b) VA tan θ (c) (VA)/(tan θ) (d) (VA)/(sin θ)

Answer: (d). sin θ = (μB)/(μA) = (VA)/(VB). VB = (VA)/(sin θ) So the answer is (d) (VA)/(sin θ).

The critical angle for light going from medium A into medium B is θ… | MHT CET 2021 (22 Sep, Shift 1)

Q30MHT CET 2021 · 22 SEP · SHIFT 1Easy

Total Internal Reflection

The critical angle for light going from medium A into medium B is $\theta$ . The speed of light in the medium A is $V_A$ . What is the speed of light in the medium $B$ ?

Show answer and solution

Answer: (d)

$\sin\theta = \frac{\mu_B}{\mu_A} = \frac{V_A}{V_B}$ .
$V_B = \frac{V_A}{\sin\theta}$
So the answer is (d) $\frac{V_A}{\sin\theta}$ .

Report a mistake

More questions on Total Internal Reflection

The refractive index of glass is 1.5 and that of water is 1.33. The critical angle for a…MHT CET 2021 (21 Sep, Shift 2)
A ray of light entering from air into a denser medium of refractive index 4/3, as shown…JEE Main 2021 (25 Jul, Shift 2)
A ray of laser of a wavelength 630 nm is incident at an angle of 30 ° at the diamond-air…JEE Main 2021 (25 Jul, Shift 1)
A glass slab has refractive index ' μ ' with respect to air and the critical angle for a…MHT CET 2021 (24 Sep, Shift 1)
Three rays of light, namely red (R), green (G) and blue (B) are incident on the face PQ…JEE Main 2021 (18 Mar, Shift 2)
If the critical angle for total internal reflection from a medium to vacuum is 45°, then…NEET 2020 (Phase 2)
A ray of light travelling through glass of refractive index √(2) is incident on glass-air…MHT CET 2020 (16 Oct, Shift 2)
The critical angle of a medium for a specific wavelength, if the medium has relative…JEE Main 2020 (8 Jan, Shift 1)

Total Internal Reflection question from MHT CET 2021 (22 Sep, Shift 1)

More questions on Total Internal Reflection