Question

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

Answer 1

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}`