Physics Paper 1 · P4 · Lesson 4.9
Is radiation reaching an object, or has radioactive material got onto it?
Irradiation means exposing an object to nuclear radiation. Radioactive material is not transferred onto the object just because it is irradiated. In the situations studied here, the object does not become radioactive.
The rays travel from the source to the object.
No timer. Read the explanation after each answer.
Daily 5 · Core exam practice · Higher Tier questions · A4 revision sheet
Lessons 4.1–4.10 cover the core. Lesson 4.11 is Higher Tier only. Daily 5 practises core facts. Answer positions are shuffled on each new attempt; lessons begin with very simple questions.
AQA Combined Science Trilogy specification · 6.4.2.4. Original notes, questions and diagrams. Experimental numbers are illustrative.
Photos: Geiger counter by Boffy b, enhanced by Marco Plassio; caesium source by Wusel007, enhanced by Partynia, both CC BY-SA 3.0. Rutherford at McGill, 1905, unknown photographer / Wellcome Images, public domain. Photos displayed without cropping or other alterations.
