AQA GCSE P1B These Cards are on AQA P1B 4.0 / 5 based on 1 rating ? PhysicsGCSEAll boards Created by: Kieran WillsCreated on: 24-06-10 13:22 Alpha rays (or particles) helium nuclei – 42 He Big and heavy (slow moving) Don’t penetrate into materials Very ionising Blocked by paper 1 of 3 Beta rays (or particles) high-energy electrons – -10 e Quite small, move quite fast Penetrate materials moderately Ionise moderately (for every beta particle emitted, a neutron turns into a proton in the nucleus) Blocked by thin Aluminium 2 of 3 Gamma rays electromagnetic waves with shorter wavelength (higher frequency) than x-rays Opposite to alpha Penetrate materials well Weakly ionising When hit something do damage Blocked by thick lead 3 of 3
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