It Is Difficult to Improve the Angular Resolution of Optical

question 190

Multiple Choice

It is difficult to improve the angular resolution of optical telescopes located on the surface of Earth beyond a certain limit because:

• A) large telescopes are always reflecting telescopes, and they suffer from too much chromatic aberration.
• B) spherical mirrors suffer from too much aberration.
• C) star images are distorted more by air turbulence than by the telescope optics.
• D) improvement would require much larger, very expensive telescopes to enhance the inherent telescope.

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