Physics A-Level
Double-slit interference
What Double-slit interference means in Physics A-Level, as defined for AQA.
Definition of Double-slit interference
Check what you remember
Read the wording for your board, then hide it and explain Double-slit interference in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Light from the laser passes through two narrow slits and the overlapping waves superpose on a screen, producing evenly spaced bright and dark fringes.
Topics that use Double-slit interference
- Interference (AQA A-Level)
Related terms
- Coherence
- Coherent monochromatic sources
- Coherent sources
- Constructive interference
- Constructive superposition
- Destructive interference
- Destructive superposition
- Double-slit arrangement
Using Double-slit interference 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