A photon , an electron and a uranium nucleus all have the same wavelength . The one with the most energy

Options

A. The uranium nucleus
B. The photon
C. Depends upon the wavelength and the properties of the particle
D. The electron

Answer

B

Explanation

`lamda = (h)/(mv) = (h)/(sqrt(2mE))`
`therefore lamda^2 = (h^2)/(2mE) therefore E = (h^2)/(2mlamda^2)`
as all have the same wavelength,
`therefore E prop 1/m`
`therefore` E is maximum for a particle with a minimum mass (i.e. photon) .