Imagine an atom made up of a proton and a hypothetical particle of double the mass of…
PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation
Problem
Imagine an atom made up of a proton and a hypothetical particle of double the mass of the electron but having the same charge as the electron. Apply the Bohr atom model and consider all possible transitions of this hypothetical particle to the first excited level. The longest-wavelength photon emitted has wavelength λ, given in terms of the Rydberg constant R for the hydrogen atom, equal to:
(1) 5R9
(2) 5R36
(3) 5R18
(4) R4