Multiple Choice
A photon is emitted from a galaxy with a wavelength of 100 nm.By the time it reaches a telescope on Earth,the photon has a wavelength of 800 nm.By what factor has the Universe expanded between the photon's emission and detection?
A) 2
B) 4
C) 8
D) 16
Correct Answer:
Verified
Correct Answer:
Verified
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