Q.13 Lightning and thunder take place in the sky at the same time and at the same distance from us. Lightning is seen earlier and thunder is heard later. Can you explain why?

Lightning and thunder take place in the sky at the same time and at the same distance from us.

But lightning is seen earlier and thunder is heard later because the speed of light is more than that of the speed of sound. So due to more speed of light, it reaches us before sound.

The speed of light in air is 3 x 10⁸ m/s² while the speed of sound in air is 343 m/s².