Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen,why?
(N/A) This happens because of the difference in the velocities of light and sound waves.
The speed of sound in air $(330 \; m/s)$ is significantly lower than the speed of light in air $(3 \times 10^8 \; m/s)$.
Hence,although the flash and thunder are produced simultaneously,light (flash) reaches the Earth's surface much earlier than sound (thunder).
Therefore,thunder is heard a few seconds after the flash is seen.
The speed of sound in air $(330 \; m/s)$ is significantly lower than the speed of light in air $(3 \times 10^8 \; m/s)$.
Hence,although the flash and thunder are produced simultaneously,light (flash) reaches the Earth's surface much earlier than sound (thunder).
Therefore,thunder is heard a few seconds after the flash is seen.
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