HSC Physics — Module 7
Emission Spectra — Flashcards & Quiz
Atomic emission spectra consist of discrete lines at specific wavelengths, and the Bohr model explains them through transitions between quantised energy levels where ΔE = hf. HSC Physics Module 7 asks you to calculate photon wavelengths using the Rydberg formula, identify the Balmer (visible), Lyman (UV) and Paschen (IR) series, and explain how emission and absorption spectra are used in astrophysics to identify stellar composition and red-shift.
Sample Flashcards
Q1: What is an emission spectrum and how is it produced?
An emission spectrum is produced when excited atoms release energy as photons during electron transitions from higher to lower energy levels. Each element has a unique set of spectral lines (fingerprint). Hot gas → line spectrum. Hot solid/liquid → continuous spectrum.
Sample Quiz Questions
Q1: All elements produce identical emission spectra.
Answer: FALSE
Each element has unique energy levels, producing a unique emission spectrum (spectral fingerprint). This enables spectroscopic identification.
Related Concepts
Last updated: March 2026 · 1 flashcards · 1 quiz questions