#### If the momentum of an electron is changed by P, then the de Broglie wavelength associated with it changes by 0.5%. The initial momentum of electrons will be: Option 1) 400 P Option 2) Option 3) 100 P Option 4) 200 P

given

initial momentum is

-ve sign show change will be opposite to change in wavelength

Option 1)

400 P

This option is incorrect

Option 2)

This option is incorrect

Option 3)

100 P

This option is incorrect

Option 4)

200 P

This option is correct