Radio telescopes have to be so large because radio-wave energy coming from space is _________ and the wavelengths of this energy are _________.
A)weak; long
B)strong; long
C)strong; short
D)weak; short

Question

Quizplus · Accepted Answer

Radio-wave energy coming from space is weak and has long wavelengths. Therefore, to capture and detect this energy, radio telescopes need to be very large in order to have the sensitivity and resolution to receive it.

Radio Telescopes Have to Be So Large Because Radio-Wave Energy