Find the initial momentum of electron if the momentum of electron is changed by `p_(m)` and the De Brogile wavelength associated with it changed by `0.50%`

Explanation

Since `P = h//lamda`
Differentiation `(DeltaP)/(Delta lamda) = - (h)/(Delta lamda^2) = - h/lamda xx 1/lamda P = h/lamda`
`(|Delta P|)(P) = (Delta lamda)/(lamda)`
Now according to question `Delta P = P_m`
` therefore (P_m)/(P) = (Delta lamda)/(lamda) rArr P = (lamdaP_m)/(Delta lamda) P = (P_m 100)/(0.50)`
`rArr P = 200 P_m`