Thunder

Thunder is the sound caused by lightning. Depending on the nature of the lightning and distance of the listener, thunder can range from a sharp, loud crack to a long, low rumble (brontide). The sudden increase in pressure and temperature from lightning produces rapid expansion of the air surrounding and within a bolt of lightning. In turn, this expansion of air creates a sonic shock wave, similar to a sonic boom, which produces the sound of thunder, often referred to as a clap, crack, or peal of thunder. The distance of the lightning can be calculated by the listener based on the time interval from when the lightning is seen to when the sound is heard.

Read more about Thunder:  Cause, Etymology, Calculating Distance

Famous quotes containing the word thunder:

    Of late, eternal Condor years
    So shake the very Heaven on high
    With tumult as they thunder by,
    I have no time for idle cares
    Through gazing on the unquiet sky.
    Edgar Allan Poe (1809–1849)

    So gladly, from the songs of modern speech
    Men turn, and see the stars, and feel the free
    Shrill wind beyond the close of heavy flowers,
    And through the music of the languid hours,
    They hear like ocean on a western beach
    The surge and thunder of the Odyssey.
    Andrew Lang (1844–1912)

    O the orator’s joys!
    To inflate the chest, to roll the thunder of the voice out from the ribs and throat,
    To make the people rage, weep, hate, desire, with yourself,
    To lead America—to quell America with a great tongue.
    Walt Whitman (1819–1892)