Calculate the de Broglie wavelength associated with an electron moving with a speed `0.1%` of the speed of light in free space.

Explanation

Data: `c = 3 xx 10^(8) m//s, v=0.1/100 xx 3 xx 10^(5)` m/s.
`h=6.63 xx 10^(-34) J.s, m=9.1 xx 10^(-31)` kg
The de Broglie wavelength, `lambda= h/p = h/(mv)`
`=(6.63 xx 10^(-34))/(9.1 xx 10^(-31) xx 3 xx 10^(5))`
`=(6.63 xx 10^(-34))/(27.3 xx 10^(-26))`
`=2.429 xx 10^(-9) m = 24.29 Å`