Question

During a thunderstorm sound of thunder is heard after lightning, why?

Answer 1

1. The speed of sound is $344m/s$.
2. It is very less than the speed of light which is $3\times {10}^{8}m/s$
3. The Sound of thunder takes more time to reach the surface of Earth as compared to light.
4. Speed of light $>>>>>$speed of sound.
5. Hence, a flash is seen before we hear a thunder.