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Atomic and Nuclear Physics — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsAtomic and Nuclear Physics1 Mark
MCQ
Hydrogen atom emits blue light when it changes 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 $21.2 \times 10^{-11} m$. What is the principal quantum number $n$ of the final state of the atom
  • A
    Red
  • B
    Yellow
  • C
    Green
  • ✓
    Violet
✓

Answer

Correct option: D.
Violet
In the transition from orbit $5 \rightarrow 2$, more energy is liberated as compared to transition from $4 \rightarrow 2$.

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