Physics A-Level
null result
What null result means in Physics A-Level, as defined for AQA.
Definitions of null result
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Reference: AQA
No significant fringe shift was observed, so the expected aether effect was not detected beyond experimental uncertainty.
No fringe shift beyond experimental uncertainty was detected, so no motion relative to an absolute frame was detected.
Topics that use null result
- The Michelson-Morley experiment (A-level only) (AQA A-Level)
Related terms
- absolute motion
- Classical Galilean velocity addition
- Interference fringes
- Interferometer
- Invariance of the speed of light
- Michelson-Morley experiment
- Part-silvered mirror
- Phase difference
Using null result in the exam
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