Question

Flash of lighting reaches _________ than the sound of thunder.

• A. earlier
• B. later
• C. same as
• D. cant say

Answer 1

The correct option is A earlier

Lightning and thunder are produced simultaneously, but the thunder is heard a few seconds after the lightning is seen. This is because the speed of light in air is more than the speed of sound in air.
The speed of light is given as $3\times {10}^8$ m/s.
The speed of sound is $340$ m/s.
Hence, the flash of lightning is seen before the thunder is heard as the speed of lightning is greater than the speed of thunder.