Question

Use the de Broglie's Wave Equation to find the wavelength of a 200 g ball moving at 20 m/s. Please show your work. Note: h = Plank's constant (6.62607 x 10-34 J s) ?

Answer 1

I tried this:

Explanation:

We have from deBroglie:

`lambda=h/p=h/(mv)`

`lambda=(6.2607xx10^-34)/(0.2*20)=1.5651xx10^-34m`

considering units:

`lambda=(J*s)/(kg*m/s)=(N*m*s)/(kg*m/s)=((color(red)(cancel(kg)*cancel(m)/cancel(s^2)))*m*cancel(s))/(cancel(kg)*cancel(m)/cancel(s))=m`