Question

Three photons coming from excited atomic-hydrogen sample are picked up. Their energies are 12.1 eV, 10.2 eV and 1.9 eV. These photons must come from

(A) a single atom

(B) two atoms

(C) three atoms

(D) either two atoms or three atoms

Answer 1

Correct option (D) either two atoms or three atoms

Explanation:

Two or three atom are used