Physics - OCR Gateway - Foundation Tier - P4

  • Created by: lala2127
  • Created on: 14-06-18 11:50
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  • Physics - P4
    • Wave Basics
      • Transfer energy
      • Medium = what is travelling through
      • Particles stay in the same place - energy moves
      • Transverse waves
        • Sideways vibrations
        • e.g ripples on the surface of water
      • Longitudinal waves
        • Vibrations in direction of travel
        • e.g. sound waves
    • Wave Speed
      • Wave speed = frequency x wavelength
      • Oscilloscope
    • Reflection
      • Angle of incidence = angle of reflection
      • Practical: use a ray box and a mirror
    • Refraction
      • Waves change direction at a boundary
      • The way it bends depends on the material it goes through
    • Electromagnetic Waves
      • Radio waves
        • communication
      • Microwaves
        • Satellites and cooking
      • Infra-red radiation
        • Cook and heat things
      • Visible light
        • Send data through fibre optic cables
      • Ultraviolet ratiation
        • Suntan
      • X-Rays and gamma rays
        • Medicine
    • Radioactive Decay
      • Alpha
        • Mass: 4, Charge: +2
      • Beta
        • Mass: n/a, Charge: -1
      • Gamma
        • Mass: n/a, Charge: n/a
    • Half Life
      • Average time taken for activity (or count rate) to halve
        • For half of the unstable nuclei to decay
      • Short half life - activity falls quickly
      • Long half life - activity falls quickly

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