what are the difficulties in using ground based optical telescopes how are they overcome in short form
Answers
The difficulties in using ground based optical telescopes is that environment which preserves life on Earth also intervenes with a telescope’s image quality. The components and particles in the Earth’s environment curve the light so that pictures discovered from observatory telescopes seems to be blurred.
It can be recovered by Hardware-oriented reconstruction methods which are based on adaptive optics and wave-front sensing. Image-processing-based techniques comprise of speckle-imaging methods and hybrid imaging procedures which use ingredients of image reconstruction.
Answer:
The difficulties faced in using ground-based telescopes due to which it does not make good quality observations are:
Intensity of light rays reaching the Earth's surface decreases as some of the light is absorbed by the atmosphere.
The change in atmospheric pressure and temperature cause the light rays to change their path slightly and thus shake the position of the image.
We cannot use optical telescopes during day time because of the presence of sunlight.
Even in night, city lights and cloudy weather can cause hindrance in observing the heavenly bodies.
To overcome the above problems, telescopes are now being erected in space itself. Some of the telescopes in space are:
Hubble telescope: It is an optical telescope launched by the National Aeronautics and Space Administration in 1990. It is orbiting the Earth at a height of 589km from it and has a mirror of diameter 94 inches.
Chandra: It is an X-ray telescope launched by the National Aeronautics and Space Administration in 1999. Special mirrors that can reflect X-rays are used in this telescope.
Explanation:
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