Question

flash of lighting reaches earth than the sound of thunder

Answer 1

Because light travels more faster than sound.
Average speed of light is 300000 km/s.

Hope this help you...

Answer 2

Flash of lightning is faster than the sound of thunder because the speed of sound in air is 340m/s but the speed of light in air is 300 million meters per second...If u have any doubt in the ans please ask