Two sources emit beams of microwaves. The microwaves from source A have a freque
ID: 1304492 • Letter: T
Question
Two sources emit beams of microwaves. The microwaves from source A have a frequency of 10 GHz, and the ones from source B have a frequency of 20 GHz. 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.)
Two sources emit beams of microwaves. The microwaves from source A have a frequency of 10 GHz, and the ones from source B have a frequency of 20 GHz. 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 photon in beam B has the same energy as a photon in beam A. A photon in beam B has twice the energy of a photon in beam A. The intensity of beam B is twice as great as the intensity of beam A. Beam B carries twice as many photons per second as beam A. None of the above statements are true.Explanation / Answer
ENergy of a photon beam is given by
E=hf
Therefore Energy is directly proportional to frequency
=>EB =2EA
Answer is B) photon in beam B has twice the energy of a photon in beam A.
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