To compensate for atmospheric distortion using adaptive optics, a bright object must serve as a target. How is this accomplished?
A) Adaptive optics can only be used when a bright star is in the field of view.
B) Sunlight reflecting from artificial satellites serves as the target.
C) Adaptive optics can only be used on very powerful telescopes for which even faint stars can be used as targets.
D) Lasers are used to excite sodium atoms in the upper atmosphere to glow and serve as a target.
Correct Answer:
Verified
Q37: In order to correct for spherical aberration:
A)a
Q38: If a beam of waves passes through
Q39: In telescopes, the resolution is worse for:
A)larger
Q40: Assuming that all effects due to variations
Q41: If all effects caused by Earth's atmospheric
Q43: The diffraction-limited angular resolution of one telescope
Q44: What do adaptive optics actuators do?
A)They deform
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Q47: Each of the following is a technique
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