- #1

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## Summary:

- Could Planck-Einstein relation be applied to matter waves?

My friend gave me some statements which are wrong, but I could not tell why they are wrong.

He wrote,

Since ##\omega = \frac E \hbar = \frac {\hbar k^2} {2m} = k v##, then##p=\hbar k =2mv##.

I guess that ##E =\hbar \omega## may only appied to photons, not matter waves. Is that correct?

He wrote,

Since ##\omega = \frac E \hbar = \frac {\hbar k^2} {2m} = k v##, then##p=\hbar k =2mv##.

I guess that ##E =\hbar \omega## may only appied to photons, not matter waves. Is that correct?