Grades/ Grade 12/ Physics/Unit 10 · Atomic Spectra

Class XII · Physics · Chapter 10

Atomic Spectra — three ways to learn it.

Build up the Bohr atom, watch electrons jump between energy levels and split light into the hydrogen spectral series, then test yourself. Pick any door — they all teach the same chapter.

Choose how you want to learn

Lecture & walkthrough

The complete written lesson — Bohr's postulates for the hydrogen atom, quantised energy levels (Eₙ = −13.6/n² eV), the spectral series (Lyman, Balmer, Paschen), emission versus absorption spectra and the Rydberg formula, plus how X-rays and lasers are produced.

8 sections · ~25 min read

Open the lecture →

Interactive lecture

As you scroll, a live animated panel brings every idea to life: nudge an electron to a higher orbit, drop it back down and watch the exact photon fly out as a coloured spectral line — the energy-level diagram and the hydrogen spectrum, alive on screen.

Same content · live animation per section

Open the interactive lecture →

Run the hydrogen-spectrum experiment on a safe, virtual bench: measure the Balmer-line wavelengths, plot 1/λ against the level terms and pull the Rydberg constant straight off your own data.

Hands-on · spectrometer & Rydberg plot

Enter the virtual lab →

Test yourself

📝 Practice — board MCQs & solved numericals ← Back to all chapters

One chapter, three doors

Read it, jump the electron in the animated lecture, then check yourself.