Explain why there is usually a time delay between observing a flash and hearing a thunder?
(N/A) The speed of light in air is approximately $3 \times 10^8 \text{ m/s}$, whereas the speed of sound in air is approximately $343 \text{ m/s}$ at room temperature.
Because the velocity of light is significantly greater than the velocity of sound, the light from the lightning flash reaches the observer almost instantaneously.
In contrast, the sound waves produced by the thunder travel much slower, resulting in a noticeable time delay between seeing the flash and hearing the thunder.
Because the velocity of light is significantly greater than the velocity of sound, the light from the lightning flash reaches the observer almost instantaneously.
In contrast, the sound waves produced by the thunder travel much slower, resulting in a noticeable time delay between seeing the flash and hearing the thunder.
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