The refractive index of air, water, diamond and crown glass is 1.0003, 1.33, 2.42 and 1.52 respectively. In which medium the speed of light would be the slowest?

Air

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Water

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Diamond

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Crown glass

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C Diamond
From definition of refractice index,
$μ = \frac{c}{v}$
$v = \frac{c}{μ}$
$v \propto \frac{1}{μ}$

So refractive index is inversely proportional to the refractive index of a medium. Hence the speed of light is slowest in the diamond.

Suggest Corrections

Similar questions

Solve:

(1) The speed of light in a transparent medium is 2.4 × 10⁸ m/s. Calculate absolute refractive index of the medium.

(2) The speed of light in water and glass is 2.2 × 10⁸ m/s and 2 × 10⁸ m/s, respectively. What is the refractive index of −

(a) water w.r.t. glass

(b) glass w.r.t. water.

(3) Refractive index of water is 4/3 and speed of light in air is 3×10⁸ m/s. Find speed of light in water.

Medium	Speed of light
Vacuum Flint glass Crown glass	3.00 × 10⁸ m/s 1.86 × 10⁸ m/s 1.97 × 10⁸ m/s

{3.00 \times 10}^{8} m / s, {1.86 \times 10}^{8} m / s a n d {1.97 \times 10}^{8}

Join BYJU'S Learning Program