Physics P1 Topic 1

Physics P1 Topic 1

1. Changing Ideas About the Universe

   • Geocentric/Heliocentric
     • Geocentric
       • Earth is the Centre of the Universe
       • Circular Orbits
       • Ancient Greeks to late 1500s
     • Heliocentric
       • Sun is Centre of the Universe
       • Circular Orbits
       • Copernicus (1543)
         • First Person to Publish Earth Isn't the Centre of the Universe
       • Galileo
         • 1610
           • Observation of Jupiter's Moon's
             • Moons Orbit Jupiter
               • Disproves Geocentric Model
             • Telescope
               • New Invention
     • BOTH FLAWED IDEAS

2. The Basics of Waves

   • Wave Diagrams
     • Wavelength
       • Peak - Peak
     • Frequency
       • Complete Waves per Second
     • Amplitude
       • Mid-line - Peak
     • Speed
       • How Fast it Goes
   • Formula for Wave Speed
     • Speed (m/s) = Frequency (Hz) x Wavelength (m)
     • Wave Speed (m/s) = Distance (m)/Time (s)
   • Transverse and Longitudinal Waves
     • Transverse
       • Vibrate at 90' to direction of travel
       • EM, S-Waves, Strings and Strings, Ripples
     • Longitudinal
       • (Ultra)Sound, P-Waves, Slinky when Push and Pull
       • Vibrate in Same Direction as Travel

3. Reflection and Refraction

   • Angle of Refraction = Angle of Incidence
     • Same Direction When in Same Density Medium
   • EM = Slow in Denser, Sound = Fast in Denser
   • Slows Down = Towards Normal

4. Lenses

   • Converging
     • Convex
     • Light Rays Move Towards the Normal
   • Focal Length
   • Focal Point

5. Telscopes