Each photon a radio telescope collects has less energy than a visible light photon because radio photons
A) have shorter wavelengths than visible light
B) are not electromagnetic radiation.
C) have longer wavelengths than visible light
D) a and b
E) none of the above
Correct Answer:
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Q22: In modern astronomy,an interferometer
A) is the highest
Q23: A telescope whose objective is a lens
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Q42: CCD stands for a
A)photometer.
B)charge-coupled device.
C)spectrograph.
D)core collapse device.
E)grating.
Q47: A _ is used to produce and
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