Question

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

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

Answer 1

The correct option is D Violet

$E_5-E_1=\Delta E_{51}$
$\Delta E_{51}>\Delta E_{42}$ Violet color has more energy than Blue color while all colors in the option have less energy than Blue color
$\therefore$ Violet