Physics A-Level
Tracer
What Tracer means in Physics A-Level, as defined for AQA.
Definition of Tracer
Check what you remember
Read the wording for your board, then hide it and explain Tracer in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
A substance taken up by an organ whose emitted gamma photons are detected outside the body, and which must be non-toxic and have a known biological pathway.
Topics that use Tracer
- Nuclear instability (A-level only) (AQA A-Level)
Related terms
- Alpha emission
- Beta-minus decay
- Beta-plus decay
- Conservation laws
- Electron capture
- Gamma emission
- Nuclear equations
- Nuclear excited state
Using Tracer in the exam
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