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Question: What is the energy of one photon of light with a wavelength of 445 nm?

What is the energy of one photon of light with a wavelength of 445 nm?

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Answer:

Answer

use the equation

E=hc/λ

where

E = energy need to calculate

h = planks constant = 6.626 x 10-34 Js

c= speed of the light = 3.0 x 108 m/s

λ = wavelength = 445 nm convert in to meters = 445 x 10-9 m

put all these values in the above equation

E = (6.626 x 10-34 Js) (3.0 x 108 m/s) / 445 x 10-9 m

E = 4.46 x 10-19 J or

or

E = 4.46 x 10-16 kJ

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