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3 K E 3 4 eV 3 3 4 eV n 4 4 None of these 4 T 57 A 2 kW radio transmitter operates at a frequency of 400 57 2 kW Hz How many photons per second does it emit 1 1 71 x 1021 2 1 88 1033 3 6 02 x 1023 4 7 55 1033 n 4 R Mhu 1 1 71 x 1021 2 1 88 x 1033 3 6 02 x 1023 4 7 55 x 1033 400 Hz for at 2x103 6 626x104 X
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