## EM Radiation and DeBroglie Equation

$\lambda=\frac{h}{p}$

DTingey_1C
Posts: 55
Joined: Fri Aug 30, 2019 12:16 am

### EM Radiation and DeBroglie Equation

Since the DeBroglie equation requires a momentum to work, how does EM radiation have a wavelength? I thought light was massless, so how would it have a momentum that could be plugged into the equation?

Callum Guo 1H
Posts: 134
Joined: Fri Aug 02, 2019 12:15 am
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### Re: EM Radiation and DeBroglie Equation

i don't think theres a consensus about that, it's a weird property of light to have momentum but not mass. Heres an article that I read online: http://www.desy.de/user/projects/Physic ... _mass.html

DTingey_1C
Posts: 55
Joined: Fri Aug 30, 2019 12:16 am

### Re: EM Radiation and DeBroglie Equation

Thanks for the article that's really interesting

Robert Cross 1A
Posts: 35
Joined: Wed Sep 11, 2019 12:15 am

### Re: EM Radiation and DeBroglie Equation

Callum Guo 1A wrote:i don't think theres a consensus about that, it's a weird property of light to have momentum but not mass. Heres an article that I read online: http://www.desy.de/user/projects/Physic ... _mass.html