Greenrune113 Greenrune113

29-11-2016
Chemistry

Answered

The wavelength of a certain beam of light was \(3.52 x 10^-^7\).

Calculate how much energy this light has.

Verified Answer :

jackmac1 jackmac1

29-11-2016

λ represents the wavelength, E the energy, h the constant of Planck, and c the celerity of light.
E = hc / λ, in which h = 6.63 10^-34 J.s, c = 310^8 m/s, and λ = 3.5210^-7 m
So E = (6.63 10^-34 3 10^8) / 3.52 10^-7
E = 1.989 10^-25 / 3.52 * 10^-7
E ≈ 5.65 J

Hope this Helps! :)

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