According to de Broglie's hypothesis, the wavelength associated with a moving particle of mass $m$ and speed $v$ is
A$\lambda = \dfrac{h}{mv}$
B$\lambda = \dfrac{mv}{h}$
C$\lambda = \dfrac{hc}{mv}$
D$\lambda = \dfrac{h}{m v^2}$
Answer & Solution
Correct answer: A. $\lambda = \dfrac{h}{mv}$
De Broglie proposed that every moving material particle has an associated matter wave with wavelength $\lambda = h/p$. Since momentum $p=mv$ for a non-relativistic particle, $\lambda = h/(mv)$.
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