Physics A-Level
Line spectra
What Line spectra means in Physics A-Level, as defined for OCR.
Definition of Line spectra
Check what you remember
Read the wording for your board, then hide it and explain Line spectra in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Because the level spacings are fixed, the photons absorbed or emitted have specific energies and therefore specific frequencies and wavelengths, producing line spectra rather than a continuous spectrum.
Topics that use Line spectra
- Electromagnetic radiation from stars (OCR A-Level)
Related terms
- Black-body modelling of stars
- Continuous spectrum
- Discrete energy levels
- Emission line spectrum
- Energy levels
- Estimation of stellar surface temperature
- Grating spacing
- Luminosity
Using Line spectra in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Physics questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Physics A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge