Question

Why do scattered electron waves interfere destructively?

Answer 1

Explanation:

We know that, σ(θ)=σM(θ)F(q)2σ(θ)=σM(θ)F(q)2, where σM(θ)σM(θ) is the scattering cross section for a point nucleus while σ(θ)σ(θ) is the observed scattering cross section from a nucleus of a finite size.Here, F(q) is the form factor.

σM(θ)=Ze28πϵ0Ecos2θ/2sin4θ/2σM(θ)=Ze28πϵ0Ecos2θ/2sin4θ/2 In a book, it's given that the form factor F(q) is lower than one as the scattered electron waves from different parts of the nucleus interfere destructively.

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