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


Sagot :

Step-by-step explanation:

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

[tex]E = h\nu = \dfrac{hc}{\lambda}[/tex]

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

[tex]\:\:\:\:\:= 3.058×10^{-19}\:\text{J}[/tex]