Question

Multiply the wavelength of an electron spinning at a speed of 2.05 x 10 7 ms -1. [Mass of electrons = 9.1 x 10 -31 kg]​

Answer 1

Explanation:

According to Debrogile's eqn-:

Lambda=h/mv

=6.626×10^-34/9.1×10^-31×2.05×10^7

=6.626×10^-34/9.1×2.05×10^-31+7

=6.626×10^-34/18.655×10^-24

=6.626/18.655×10^-10

=0.355nm.