Charge-coupled devices (CCDs) are more useful than photographic plates for optical telescopes because CCDs:
A. can measure brightnesses more precisely.
B. are cheap and disposable.
C. do not produce diffraction fringes.
D. are not susceptible to chromatic aberration.
Answer:A
Charge-coupled devices (CCDs) are more useful than photographic plates for optical telescopes because CCDs:
A. can measure brightnesses more precisely. B. are cheap and disposable. C. do not produce diffraction fringes. D. are not susceptible to chromatic aberration.