The Speed of light in vacuum is:

2 \times 10^{10} m / s

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3 \times 10^{8} m / s

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4 \times 10^{5} m / s

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2 \times 10^{12} m / s

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Solution

The correct option is B $3 \times 10^{8} m / s$
Light travels in vacuum with a speed of $3 \times 10^{8} m / s$ . It is the maximum speed of light.

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Similar questions

The speed of light in air is: (a) $3 \times 10^{8} c m / s$ (b) $3 \times 10^{8} m m / s$ (c) $3 \times 10^{8} k m / s$ (d) $3 \times 10^{8} m / s$

Q. The speed of light in water is 2.25 × 10⁸ m/s. If the speed of light in vacuum be 3 × 10⁸ m/s, calculate the refractive index of water.

Q. The speed of light in air is 3 × 10⁸ m/s. In medium X its speed is 2 × 10⁸ m/s and in medium Y the speed of light is 2.5 × 10⁸ m/s Calculate:

(a) _air n_x
(b) _air n_Y
(c) _x n_Y

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.

A ray of light travelling from medium I in which speed of light is $2 \times 10^{8} m / s$ to a medium II in which speed of light is $1.5 \times 10^{8} m / s$ . Choose the correct ray diagram:

I. $u = 2 \times 10^{8} m / s$

II. $v = 1.5 \times 10^{8} m / s$

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The Speed of light in vacuum is:

The correct option is B 3×108m/sLight travels in vacuum with a speed of 3×108m/s. It is the maximum speed of light.

The correct option is B $3 \times 10^{8} m / s$
Light travels in vacuum with a speed of $3 \times 10^{8} m / s$ . It is the maximum speed of light.