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The wavelength of the blue light given off by a mercury vapor street lamp is 436 nm.?

riosmcdowell

wrote...

Posts: 22

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11 years ago

The wavelength of the blue light given off by a mercury vapor street lamp is 436 nm.?

What is the energy of this light in joules?

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1 Reply

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smithj8787

wrote...

#1

11 years ago Edited: 11 years ago, bio_man

Hi,

We use the formula E=hv = hc/gamma

gamma (wavelength) = 436nm = 436x10^-9m = 4.36x10^-7m

E = 6.63x10^-34J x 3x10^8m/sec / 4.36x10^-7m = 4.56x10^-19J

Good luck

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