Question

derive lamda=h by root 2mE.

Answer 1

According to de brogli equation

Let us give a name "L" to lamda

L = h/p

L = h/ mv ( p = mv)

We know that

KE = 1/2 mv^2

multiple m in both sides we get,

2mKE =( mv) ^2

mv = /2mKE

L = h/ /2mKE