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An AIR station is broadcasting the waves of wavelength 300 metres. If the radiating power of the transmitter is 10 kW, then the number of photons radiated per second is

(a) $1.5×{10}^{29}$              (b) $1.5×{10}^{31}$
(c) $1.5×{10}^{33}$              (d) $1.5×{10}^{35}$