# De broglie wavelength is postulate?

1. Aug 12, 2004

### einstein_vishnu

we have seen that for massless (rest) patricle.we can relate the particle nature with the wave nature by einstein's relation.
we cann't use the same relativistic eqation for the momentum energy relation to generalise that to matter waves too,because rest mass is not zero.Griener mentions that it is postulate,if we try other form then we can get rid off complex schrodinger wave function.

2. Aug 12, 2004

### Galileo

The Planck-Einstein relations

$$E=h\nu=\hbar \omega$$

$$\vec p=\hbar \vec k$$
initially held for photons alone.
It was later postulated to hold for material particles as well.

I hope that's an anwer to your question.

3. Aug 13, 2004

### einstein_vishnu

why should we take the same equations for particle with nonzero rest mass.that derivation includes the relativistic relation between energy, momentum and rest mass.this gives the answer for my valid question of altering debroglie wavelength.