Question

Assertion: The flash of lightening is seen before the sound of thunder is heard. 

Reason : Speed of sound is greater than speed of light.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

The correct option is (c) A is true but R is false.

Explanation:

The speed of sound is 340 m/s and speed of Light is 3 x 10⁸ m/s in air. Thus flash of lightening is seen before the sound of thunder is heard.