# De Broglie wavelength

#### QueenFisher

we were having a discussion about this in physics and my teacher mentioned a relationship between the formula and some angle (don't know which!) but it's not on the syllabus any more, i was wondering does anyone know anything about this?

cheers for the help

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#### Chi Meson

Homework Helper
Was there by any chance some mention of the "Compton effect"? Or was it mentioned in terms of x-rays? Or perhaps electron diffraction?

The deBroglie wavelength is used in may advanced physics applications; you'd have to give us some kind of clue here.

#### QueenFisher

well it must be something pretty simple as it's only AS level physics, it came up during a discussion about the photoelectric effect...

#### Chi Meson

$$\lambda '- \lambda=(h/mc)(1-cos \theta)$$