# With what velocity must an electron travel so that its momentum is equal to that of a photon of wavelength = 5200 Å?

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With what velocity must an electron travel so that its momentum is equal to that of a photon of wavelength = 5200 Å?

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According to de Brogue equation, λ = $\frac{h}{mv}$

Momentum of electron, mv = $\frac{h}{λ}$