## Question

Calculate de-Broglie wavelength for an electron and a proton moving with the same speed of 10^{5} m/s. (*m _{e}* = 9.1×10

^{ –31}kg,

*m*= 1.67 × 10

_{p}^{ –27}kg and

*h*= 6.63 × 10

^{ –34}Js).

### Solution

The de-Broglie wavelength associated with a particle of mass *m* moving with speed *v* is given by

Where *h* is Planck’s constant. Thus, the de-Broglie wavelength associated with the electron is

And the wavelength associated with the proton is

#### SIMILAR QUESTIONS

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