De Broglie wavelengths

[rkang00]

Are De Broglie wavelengths used for large particles? How do we know when to use the De Broglie equation to get a wavelength? It's confusing when to use the De Broglie or the E=hv equation.

[Sameen Mahmood 3D]

De Broglie wavelengths are used for large particles as well as anything that has rest mass. You'll know when to use it based on the parameters given; for instance, if you are given mass, velocity, momentum, or wavelength, you can predict that you'll have to use De Broglie because the other equation uses joules and frequency/wavelength.

[isarose0]

Is de Broglie more commonly used for small or large particles? Does size matter?

[George Ghaly 2L]

De Brogile equation is used for any object with moment and wavelength, so in reality it could be applied to almost all scenarios although it would be pointless if it used on an object with a large wavelength.