A photon of light has a wavelength of 0.050 cm. What is its energy?

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Answer 1 · 2016-01-23T12:08:05

$3.96 \times 10^{- 22} J$ $3.96xx10^(-22)J$

First find the frequency of the photon from the equation

$c = f λ$ $c=flambda$

$therefore f=c/lambda=(3xx10^8m//s)/(0.050xx10^(-2)m)=6xx10^11Hz$ .

Energy of such photons is quantized and given by

$E=hf$

$=(6.6xx10^(-34))(6xx10^11)$

$=3.96xx10^(-22)J$