Question

The mass of electron is 9.1×10–³¹.If its Kinetic Energy is 3.0×10-²5 Calculate the wavelength


plzz solve the question​

Answer 1

k.e.=mv²

3*10↑25=9.1*10↑31*v²

v²=(3/9.1)*10↑-6

v={(10↑-6)/3.03}½

now, wavelength=v*time

let t=1s

→wavelength=(10↑-6/3.03)½

hope you got it... it's difficult to explain via text