An electron , initiallty at rest is released from a large distance from a proton (fixed in space ). The de-broglie wavelength of the electron when it is at distance r from proton is `lambda` the ratio of its kinetic energy at this distance with the kinetic energy of the electron is ground stae of hydrogen atom (Bohr model) with the radius of its orbit being r, is `alpha` Pick the correct options (s)

Options

A. `lambdapropsqrt(r)`
B. `lambdaprop(1)/(r)`
C. `alpha=(1)/(2)`
D. `alpha=2`

Answer

A, D