Astronomy 210 Quiz 3, spring semester 2013
Cuesta College, San Luis Obispo, CA
Adaptive optics improves the resolution of telescope images by using a computer to rapidly:
(A) change the humidity inside the tube.
(B) trigger a laser to heat up the atmosphere.
(C) combine the light collected by several connected telescopes.
(D) adjust the shape of the mirror.
Correct answer: (D)
Distortions in images caused by atmospheric turbulence can be removed in real-time by using a computer to reshape the (secondary) mirror such that a reference star (or a laser beam) within the field of view has a point-like shape. Response (C) is interferometry (which also improves the resolution of telescope images).
Section 30676
Exam code: quiz03sPmP
(A) : 0 students
(B) : 0 students
(C) : 17 students
(D) : 27 students
Success level: 64% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.55
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment