Question

Explain why, the flash of lighting reaches us first and the sound of thunder is heard a little later ?

Answer 1

Because the sound of thunder only travels at the speed of sound, while the light from the flash travels at the speed of light. The speed of sound is about 340 meters per second through air, while the speed of light is about 300 million meters per second - almost a million times faster. So, if you were 1500 meters away from the flash, you would see it about 5 millionths of a second after it actually occurred, but you wouldn't hear the thunder until about 5 seconds later.

hope it helps

Answer 2

Because speed of ligh is more than speed of Air so lighting are seen first while sound takes time to travel so it is heard after the lighting had appeared