De Brogile's equation  [ENDORSED]

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De Brogile's equation

Postby Maldonado3K » Sun Apr 22, 2018 11:47 pm

Can someone explain what Lavelle meant when he said not to use the equation for a photon for questions related to light?

Komal Prakash 1H
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Re: De Brogile's equation  [ENDORSED]

Postby Komal Prakash 1H » Sun Apr 22, 2018 11:58 pm

We cannot use the De Brogile's equation for light, because wavelength=h/momentum, and momentum equals mass times velocity. Since photons do not have a mass, momentum would be zero, and we cannot divide by zero.

Vienna Cimetta 1L
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Re: De Brogile's equation

Postby Vienna Cimetta 1L » Mon Apr 30, 2018 12:06 am

The equation can only be used for something that has a rest mass. A photon of light does not, and therefore the equation cannot be used.

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Re: De Brogile's equation

Postby juliaschreib1A » Mon Apr 30, 2018 2:12 pm

Why do photons not have mass?? doesn't every existing thing have mass?

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Re: De Brogile's equation

Postby Chem_Mod » Mon Apr 30, 2018 3:13 pm

Photon is quantized electromagnetic radiation. It is a specific amount of energy and thus it does not have mass.

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