Absolute refractive index of water, glass, diamond and sulphuric acid are 1.33, 1.52, 2.4 and 1.41 respectively. In which of the mediums light travels the slowest?

Water

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Glass

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Diamond

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Sulphuric acid

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Solution

The correct option is C Diamond
The speed of light in a medium depends upon the refractive index of the medium.

The absolute refractive index is given by:
$n = \frac{Speed of light in vaccum (c)}{Speed of light in the medium (v)}$

Higher the refractive index, the slower is the speed of light in the medium. Therefore, from the given mediums the speed of light is maximum in water and minimum in diamond.

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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.

1.6

1.5

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