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Old 07-30-2006   #1 (permalink)
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Light

Hey

What do you think of this:

we all know light has energy but has no mass but E=mc^2 and E=hv according to the quantum theory light has to have some mass. What i say is vissible light.

E=mc^2-------------------------------(1)
E=hv-----------------------------------(2)

M=E/C^2

but when we substitute 2

M=hv/C^2

I think this would only apply if the light was taken as a particle
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Old 07-30-2006   #2 (permalink)
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Re: Light

Obviously and rightly said ,that was contradictory in earlier times,but now that particle is taken as EM force's messenger particle photon.
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Old 07-30-2006   #3 (permalink)
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Re: Light

Photon is a massless particle, but it can carry momentum right?


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