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1. If you had a telescope that had a mirror 10 times the diameter of the...

1. If you had a telescope that had a mirror 10 times the diameter of the human eye, how much more light would it collect?

2. Give two reasons why putting telescopes into space allows us to see things we would not be able to see from the ground.

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Answer #1

1. The amount of light collected by a mirror is directly proportional to square of the diameter of the mirror . As the given telescope has mirror with diameter ten times that of human eye it will collect 10^2=100 times more light.

2. Two reasons are-

A. The atmosphere of earth acts like a blanket and it absorbs certain part of wavelength of the light, so a telescope on earth can not detect those wavelengths.

B. As the atmosphere absorbs some of light falling on earth, the magnitude of light decreases, causing the far distant objects to disappear.

Both of these problems are resolved if we put the telescope out of the atmosphere,ie, in space.

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