Explain how lightning occurs between two …

A cloud is a visible mass of condensed water vapours floating in the atmosphere, high above the ground. A heavy, dark, rain cloud is called storm cloud. When a storm cloud develops in the sky, strong winds move upwards through the cloud and make the water drops present in the cloud to rub against one another which produces extremely large electric charges in the cloud due to friction. The small water drops acquire a positive charge and being lighter, move to the upper part of the cloud with rising wind. The larger water drops acquire negative charge, and being heavier, come down in the lower part of the cloud. When the magnitude of the accumulated charges becomes very large, the air which is a poor conductor of electricity, is no longer able to resist their flow. Negative and positive charges meet, producing streaks of bright light and sound. We see streaks as lightning. The process is called an electric discharge.Lightning usually occurs within a cloud in the sky called as ‘sheet lightning’. If lightning occurs between a cloud and the earth or tall objects of the earth, it is then called ‘fork lightning’.