Question

Consider aiming a beam of free electrons towards free protons. When they scatter, an electron and a proton can not combine to produce a H-atom,
A. because of energy conservation
B. without simultaneously releasing energy in the form of radiation
C. because of momentum conservation
D. because of angular momentum conservation

Answer 1

Correct Answer - A::B
When a beam of free electrons is aimed towards free protons, the electrons get scattered on account of energy conservation. An electron and a proton can cambine to produce a H-atom only if they simultaneously release energy in the form of radiation. Choices (a) and (b) are correct.