Physics
Which among the following waves is used for communication by artificial satellites ?

Frequency of 1016 series
Micro waves
M.
Radio waves

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Physics
Planets do not twinkle because

Their distance from the earth does not change with time
They emit light of a constant intensity
They are nearer to earth and hence we receive a greater amount of light.
They are very far away from the earth resulting in decrease in intensity of light

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