In a thunderstorm, there is a flash of lightning and a student hears the thunder ... speed of light is \(3\times 10^{8} m\,s^{-1}\) and so travels almost instantaneously compared to the sound).

However, because light travels faster than sound, we always see lightning before we hear thunder. So, lightning always ...

The incredible speed of lightning is a testament to ... producing the sound we recognize as thunder. However, sound travels slower than light, which is why we see the flash of lightning before ...

We usually see lightning before we hear thunder. That’s because light and sound travel at different speeds. The lightning flash travels very fast, but the sound of thunder travels much more slowly.