De Broglie's equation [ENDORSED]

[Athena L 1B]

Is De Broglie's equation the one that cannot be used for photons because it only applies to things with mass?

[Mukil_Pari_2I]

Yes. De broglie's equation (lamba = h / p) is the equation that cannot be used for photons. However, c=lambda/v, E=hv, E = (hc)/lambda, and E=(1/2)mv^2 can all be used with light.

[Yixiao Hu 3C]

you can only use v=h/p for things with matter, for p=mv. if you wanna use that equation for massless photons, you willl be unable to put any numbers for m

[Jessica Castro 2H]

De Broglie's equation can only be used for particles with rest mass. Since photons are massless, this equation does not apply for light.

[mbaker4E]

Since light always travels at the speed of constant c, light is never at rest and therefore has zero rest mass. This is why photons have no rest mass and De Broglie's equation cannot be used.

[daniela3D]

Yes. De Broglie focuses on calculating the wavelength of an object of mass.
When solving wavelengths use: wavelength= h/mv

When solving wavelength of a light or photon use: (E=hv; c=wavelength*frequency; E=hc/wavelength)

[Ahmed Mahmood 4D]

Yes. De Broglie's equation is the equation that can be applied to objects w/ mass (Such as base balls and people) to determine their wavelength.

[Radha Patel 4I]

De Broglie's equation proves that all matter has wavelike properties. Thus, it can be used to to find the wavelength of a proton or an electron by simply using the mass of a proton or electron and velocity.