# Are electromagnetic wavelength and quantum wavelength the same thing?

• B

## Summary:

A simple enough question not to need a summary - I hope

## Main Question or Discussion Point

The classical picture of the electromagnetic wave has electric and magnetic field oscillations which give the wavelength of the light. In the quantum picture, is the wavelength of the (de Broglie) wave function of the photon the same thing?

Related Quantum Physics News on Phys.org
BvU
Homework Helper
2019 Award
Meir Achuz
Homework Helper
Gold Member
Yes.

Is it suprising that something normally taken to be non physical (the wavefunction regarded as a probability amplitude) has a physical manifestation (electric / magnetic field oscillations)? What's the deeper reason behind this? Are there any other instances where classical and quantum are the same in this way?

EPR
Matter waves have no magnetic and electric fields so no. They are not the same thing as electromagnetic waves.
Matter waves are inferred whereas electromagnetic waves can be and are measured directly.