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What are the difficulties in using ground-based optical telescopes? How are they overcome?

Answer»

Difficulties:

  • The intensity of visible light coming from a heavenly body decreases due to absorption as it passes through the Earth’s atmosphere. 
  • Due to changes in atmospheric temperature and pressure light rays change their path. 
  • Because of sunlight, we cannot use optical telescopes during the day. 
  • During the night, city lights and cloudy weather cause difficulties.

Solution:

  • To reduce these problems, optical telescopes are situated on top of mountains, in uninhabited places. 
  • To get rid of all the above problems completely, the telescope is placed above the earth’s atmosphere, in space.


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