Physics A-Level
Two-source interference
What Two-source interference means in Physics A-Level, as defined for OCR.
Definition of Two-source interference
Check what you remember
Read the wording for your board, then hide it and explain Two-source interference in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Coherent light passes through two narrow slits separated by a small distance a and falls on a screen a distance D away, producing an interference pattern.
Topics that use Two-source interference
- Superposition (OCR A-Level)
Related terms
- Coherence
- Constructive and destructive superposition
- Constructive interference
- Constructive superposition
- Destructive interference
- Destructive superposition
- Grating equation
- Grating spacing
Using Two-source 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.
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