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The energy of a photon of light of wavel...

The energy of a photon of light of wavelength 450 nm is

A

`4.4 xx 10^-19 J`

B

`2.5 xx 10^-19 J`

C

`1.25 xx 10^-17 J`

D

`2.5 xx 10^-17 J`.

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