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Fig.(1.4): Earth’s Atmosphere.

An example of natural dusty plasmas in earth’s environment is the
Noctilucent clouds (NLC) Fig(1.4). It is formed in arctic mesosphere

(80 − 110 altitude approximately) in the summer. These clouds are the

coldest place in our earth’s environment and seen at night, in summer,
temperature decreases to 100 and increases in winter temperature above

200.

1.8.2 In Laboratories

Experiments have been performed on Mach cones and strongly
coupled phenomena using rf glow discharge. In many Experiments, the

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