# A-level electron speed question

1. Dec 31, 2009

### felix-corpus

calculate the speed of an electon which has a de broglie wave length of 1.3x10-10m

can any one help me with this question ive never had one like this come up so i havent a clue what to do, with only 2 weeks to my a-level exams

2. Dec 31, 2009

### Fightfish

Have you come across the de Broglie relation
$$\lambda = \frac{h}{p}$$
for matter waves?