A stellar object is emitting radiation at 1420 nm. A detector is capturing 7 107 photons per second at this wavelength. h = 6.63 x 10-34 J-s. c = 2.998 x 108 m/s.
(a) What is the total energy of the photons detected in one second?
(b) What is the total energy of the photons detected in one hour?
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