INTRODUCTION
Lightning can be defined as a transient, high current
electric discharge whose path length is generally measured in kilometers.
Lightning occurs when some region of the atmosphere attains an electric
charge sufficiently large that the electric fields associated with the
charge cause electrical breakdown of the air. However lighting has been
reported in snowstorms, sandstorms, in clouds over erupting volcanoes,
and been reported to occur in the clear air.
Such lightning can take place entirely within a cloud
(intra cloud), between two clouds, between cloud and the earth, or between
a cloud and the surrounding air.
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