Question

Hydrogen atom emits blue light when it changes from n = 4 energy level to n = 2 level. Which colour of light would the atom emit when it changes from n = 5 level to n = 2 level

• A. Red
• B. Yellow
• C. Green
• D. Violet

Answer 1

Answer: (D)

Violet

Answer 2

In the transition from orbits $5 \rightarrow 2$ more energy will be liberated as compared to transition from 4 → 2. So emitted photon would be of violet light.