An electron moves from orbit P to orbit R by absorbing radiation. It returns to P in two steps, emitting 1.8 × 10-19 J and 3.2 × 10-19 J.
What energy would be emitted if 400 electrons each made one direct transition from R to P?
2.0×10−17 J2.0\times10^{-17}\ \mathrm{J}2.0×10−17 J
1.25×10−21 J1.25\times10^{-21}\ \mathrm{J}1.25×10−21 J
5.6×10−17 J5.6\times10^{-17}\ \mathrm{J}5.6×10−17 J
2.0×10−16 J2.0\times10^{-16}\ \mathrm{J}2.0×10−16 J