de Broglie wavelength expression · CAP 2004 #Q12

Physics · modern-physics

Problem

In subatomic physics, one often associates a characteristic wavelength

\lambda

with a particle of mass

m

. If

\hbar = h/2\pi

(

h

being Planck's constant) and

c

the speed of light, which of the following expressions is most likely to be the correct one? (a)

\lambda = \hbar c/m

; (b)

\lambda = \hbar/(mc^2)

; (c)

\lambda = \hbar m/c

; (d)

\lambda = \hbar/(mc)