Which of These Techniques Is the Key Factor in a Telescope

question 223

Multiple Choice

Which of these techniques is the key factor in a telescope that uses adaptive optics to correct for atmospheric distortion of images, or "seeing"?

• A) Computer-controlled motors rapidly adjust the orientation and position of the separate primary mirrors in a multiple-mirror telescope (MMT).
• B) A corrector lens compensates for image distortion by electronic control of its shape.
• C) Computer-controlled motors adjust the position and shape of one of the small mirrors within the optics many times per second.
• D) The light rays are focused electronically, without the use of lenses or mirrors.

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