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5 votes
What is the
energy of a photon of red light with a wavelength of 6.5 x 10?m?

User Matskn
by
7.3k points

1 Answer

3 votes

Explanation:

The wavelength of red light is
\lambda = 6.5×10^(-7)\:\text{m}. The energy E of the photon is given by


E = h\\u = (hc)/(\lambda)


\:\:\:\:\:= \frac{(6.626×10^(-34)\:\text{J-s})(3×10^8\:\text{m/s})}{6.5×10^(-7)\:\text{m}}


\:\:\:\:\:= 3.058×10^(-19)\:\text{J}

User Jstell
by
6.5k points
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