The spectrum of radiation $1.0×{10}^{14}$ 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)  $\frac{6.62}{3}×{10}^{-28}$            (d) $3×6.62×{10}^{-28}$

(b)

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