Question

In which transition one quantum of energy is emitted?

• A. $n=4\to n=2$
• B. $n=3\to n=1$
• C. $n=4\to n=1$
• D. All of them

Answer 1

The correct option is D All of them

In all the three transitions $n=4\to n=2$, $n=3\to n=1$ and $n=4\to n=1$, one quantum of energy is emitted. Whenever an electron jumps from higher energy level to lower energy level, a quantum of energy is emitted.