De Broglie's Equation

[Clara Cho 2K]

Under what parameters can De Broglie's equation be used?

[Gerald Bernal1I]

It works for any particle (object that has rest mass) with momentum. It is used for objects such as cars or baseballs as shown in the lecture which do not have detectable wavelengths. De Broglie claimed that all particles must have wave like properties.

[ZainAlrawi_1J]

The De Broglie equation is used to describe the wave properties of matter, and as such the equation is reserved for things that have mass, such as electrons.

In practice, De Broglie is used when we are solving for an object's wavelength, and it has mass.

This is in contrast to what you would use when working with photons, which are massless, wherein you would use c=λν or E=hν

[Marykate Abad 3L]

De Broglie's equation can be used to solve for an object's wavelength given a mass.

[Siya Shah 1J]

De Broglie's equation concerns the variables of wavelength, velocity, and mass of an electron, as well as Planck's constant. The equation is used to describe the wave-like properties of elementary particles (including electrons), neutral atoms and molecules.

[rohun2H]

Any moving particle with momentum, cannot be applied to light.

[ShastaB4C]

Does “v” represent velocity or frequency? We used to use it for frequency for E=hv but for de Broglie’s it’s velocity?

[Leslie Almaraz 4G]

Responding to the person above, for E=hv, the v represents frequency. This is not the same symbol that is used for Debroglie's question which it wavelength= h (plank's constant)/, p (momentum). Momentum is also equal to mass x velocity, which is not the same as the v representing frequency.

[Debora Fernandez Clemente_ 4H]

Can someone explain the difference between the De Broglie's and Heisenberg's equation?

[Kim Chen]

To answer the above person — I don't have an exact explanation (might be a good question to ask during OH if you're curious about it/want to conceptualize), but De Broglie's relates the momentum and wavelength of a wave (hence wave-particle dualism), whereas Heisenberg's has nothing to do with this. However, De Broglie's principle follows Heisenberg's uncertainty principle.

[Trent Yamamoto 2J]

De Broglie is applied when we are solving for an object's wavelength, and the the resting mass is given. For example, it could be the baseball being hit or a car moving.

[briannam_1F]

Can you use De Broglie’s equation to find the wavelength in regards to electrons?

[AveryAgosto]

Any problem referring to wavelength, velocity, and mass.

[Maddie]

It only works for real particles