A) It can not work at night
B) It can detect a very faint radio signal
C) It can be operated even in cloudy weather
D) It is much cheaper than optical telescope
Correct Answer: C
Solution :
Radio waves can pass through dust, clouds, fog etc. in a radio telescope. It detects very faint radio signals due to enormous size of its reflector. Hence, it is used at night and even cloudy weather.
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