Which of the following is an inherent disadvantage of radio telescopes?
A. Radio telescopes cannot detect visible light.
B. They only work at night.
C. Radio telescopes have low magnification.
D. Radio signals are very weak, and their photons do not penetrate the atmosphere easily.
E. The long wavelength of radio waves results in lower resolving power, compared to other telescopes of the same size.
Answer: D
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