Question

Calculate the de broglie wavelength of a electron moving at 2.5% of a speed of light

Answer 1

debrogile wavelength=h/mv-------(1)

since v=2.5%c
=2.5/100 ×3×10^8
=0.075× 10^8

So wavelength=6.626 ×10^-34/(1.6×10^-19)(0.075×10^8)
=55 .21×10^-23