Question

A photon , an electron and a uranium nucleus all have the same wavelength . The one with the most energy
A. is the photon
B. is the electron
C. is the uranium nucleus
D. depends upon the wavelength and the properties of the particle

Answer 1

Correct Answer - A
`lambda = (h)/( mv) = (h)/(sqrt(2 m E)) :. E = (h^(2))/( 2m lambda^(2))`
`lambda` is same for all , so `E prop (1)/(m)`. Hence energy will be maximum for particle with lesser mass.