The spectrum of radiation 1.0×1014 Hz is in the infrared region. The energy of one photon of this in joules will be

(a) 6.62×10-48              (b) 6.62×10-20
(c)  6.623×10-28            (d) 3×6.62×10-28

(b) E=hv=6.64×10-34×1.0×1014=6.62×10-20 J

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