## DeBroglie Equation

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

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### DeBroglie Equation

Why can't the DeBroglie Equation be applied to light?

DarrenKim_1H
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### Re: DeBroglie Equation

Because light has no mass

Trinity Vu 1D
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### Re: DeBroglie Equation

This is because DeBroglie equation refers to moving particles such as a car or an electron. However, light is electromagnetic radiation and therefore you could only apply the electromagnetic equations λv=c and E=hv to photons.

Sukanya Mohapatra 2G
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### Re: DeBroglie Equation

Light does not have mass, so the DeBroglie equation would not work.

abby hyman
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### Re: DeBroglie Equation

Since you have to have a mass to find wavelength using DeBroglie's equation, it would be impossible for it to work for light because light has no mass.

Nuoya Jiang
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Joined: Sat Sep 14, 2019 12:17 am

### Re: DeBroglie Equation

Considering the DeBroglie equation, which needs you to calculate the momentum=mv, the light does not have a mass, so you can't use this equation for light.

205154661_Dis2J
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### Re: DeBroglie Equation

The DeBroglie Equation can not be applied to light because light has no mass.

Marty Hockey
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### Re: DeBroglie Equation

When using the DeBroglie equation, do the units for mass have to be in grams, and does the velocity have to be in meters per second?

Lauren Sanchez 3D
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### Re: DeBroglie Equation

So, De Broglie's equation can only be applied to things that have a mass and velocity (p)?

RasikaObla_4I
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### Re: DeBroglie Equation

The DeBroglie Equation is only used for any moving particles with momentum and has wavelike properties with wavelength. Light does not have any mass so it cannot be used to calculate momentum.