Atoms & Nuclei

JEE Main level, single correct, medium

153 of 239

Question 153 of 239

Hydrogen atom is excited from ground state to another state with principal quantum number equal to 44. Then the number of spectral lines in the emission spectra will be

Show answer and solution

Answer: (D) 66

Number of spectral lines from a state n\mathrm{n} to ground state is
=n(n−1)2=6.=\frac{n(n-1)}{2}=6.

JEE Main question paper PDF

Open a shift to read the full paper on this page, or download it.

JEE Main 2025 Apr 2 Shift 1 question paper

Open Download PDF

Opening paper…

Explain it as a whiteboard videoStep-by-step, in Hinglish or English. Your first video needs no login.Solved it on paper but got it wrong?Upload a photo of your working. Mistake Doctor marks the exact line that broke.
See it move: Atoms: Rutherford, Bohr and X-rays simulationDrag the sliders and watch the numbers in this question change.Revise Modern Physics firstFormula sheet, solved examples and the traps students fall into.

More Physics practice

JEE Main Physics practice question on Atoms & Nuclei (Atomic Spectrum), with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.