Question

Calculate energy of photon whose radiation wavelength is 400nm

Answer 1

Energy = hc/w= .2E-24/400E-9 = .5E-18 joules x 6.25E18 ev/J=3.125 ev.

Answer 2

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Energy = hc/w

= 0.2E-24/400E-9

= 0.5E-18 joules x 6.25E18 ev/J

=3.125 ev.

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