Lightning. Thunderstorm and lightning over a city. Thunderstorms are characterised by heavy rain,hail and wind. They occur when intense heating of the ground surface leads to strong upward air currents with the formation of dark cumulonimbus clouds. Within the clouds electrical charges become separated and when the differential potential reaches some 100 million Volts the insulation of the air breaks down resulting in a flow of electricity seen as the lightning flash. The image was taken on a summer night at Tucson,Arizona,United States | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wood, Kent |
Bildgröße: | 3648 px × 5595 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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