What is the wavelength of a photon with an energy of #4.56 times 10^-19# J?

1 Answer
MetaPhysik
Dec 29, 2017

#lamda= (hc)/E#

Explanation:

c = speed of light = # 3xx10^8 m/s#
E = photo energy
f = photo frequency
h = Planck's constant =6.626 #xx10^(−34) Js#
#lamda# = photo wavelength

The speed of a photo is

c = f#lamda rArr f = c/lamda#

The energy of a photon is proportional to its frequency,

#E = h f#
# E = h(c/lamda)#
#lamda = (hc)/E#

The color of the photon should be blue. Why?

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