Photon Energy: Two sources emit beams of light of wavelength 550 nm. The light from source A has an intensity of 10 µW/m2, and the light from source B has an intensity of 20 µW/m2. This is all we know about the two beams. Which of the following statements about these beams are correct? (There could be more than one correct choice.)
A. Beam B carries twice as many photons per second as beam A.
B. A photon in beam B has twice the energy of a photon in beam A.
C. The frequency of the light in beam B is twice as great as the frequency of the light in beam A.
D. A photon in beam B has the same energy as a photon in beam A.
E. None of these statements are true.
Answer: A
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