Question

The mass of a electron is 9.1 X 16-31 kg if its
kinatic energy is 3X10^-25 J., calculate
its wave length.​

Answer 1

Answer:

0.72 x 10^-3

Explanation:

From De-Broglie's formula of wavelength

lamda = h/mv

where lamda= wavelength

h= planck's constant I.e. 6.63 x 10^-34

m=mass

v=velocity

so, from the given information first we have to find velocity from Kinetic Energy and then we have to apply it in De-broglie's wavelength formula.

Answer 2

see attachment...........