A satellite in geostationary orbit is used for:

weather monitoring

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astronomical research

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TV broadcasting

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all of the above

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Solution

The correct option is C TV broadcasting
A geostationary satellite is an Earth-orbiting satellite, placed at an altitude of approximately $35, 800 k m$ ( $22, 300 m i l e s$ ) directly over the equator, that revolves in the same direction the Earth rotates.
Since, they have the same time period as of the Earth, they can view a point continuously hence are good for communications purpose. So, it is used for TV broadcasting.

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. Then, the period of spy satellite orbiting three hundred kilometers above the earth's surface (

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