## De Broglie Equation

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

Jamie Lee 1H
Posts: 54
Joined: Fri Aug 09, 2019 12:15 am

### De Broglie Equation

In class on Friday, the De Broglie equation was derived using speed of light so why can't the De Broglie equation be used for light?

vpena_1I
Posts: 109
Joined: Sat Aug 24, 2019 12:15 am

### Re: De Broglie Equation

The De Broglie equation is used for particles that have rest mass, and photons do not have any mass.

805422680
Posts: 103
Joined: Sat Sep 14, 2019 12:16 am

### Re: De Broglie Equation

The De Broglie cannot be used for light as light or photons are considered to massless, and thus any answer that you would get from that equation would be zero. The De Broglie equation can only be used for objects with a small mass and high frequency.