Light, waves, sound

Light, waves, sound

1. Light

   • Reflection of Light
   • Constructing ray diagrams
   • Refraction at flat surfaces
   • Reflections
   • Thin converging lens
   • Ray diagrams for lens

2. Sound

   • Uses
     • Healing wounds
     • Echolocation/Flash sonar
     • Levitation
   • Sound and society
     • For entertainment
     • Sonar
     • Warning for danger
     • Ultrasound
   • How we hear sound
     • Ear is a sensitive device which functions with hearing
       • Ear allows to convert audible frequencies into electrical signals
         • 3 parts: outer, middle, inner
   • How is sound produced?
     • Sound produces vibrations / vice versa
   • Pitch
     • Frequency
       • Hertz (Hz)
   • Loudness
     • Larger vibration, louder sound
   • Travelling of sounds
     • Energy passed to the surrounding molecules
     • Vacuum
       • No matter
         • Sound cannot be heard
     • Requires matter to surround the sound
       • Solid
       • Liquid
       • Gas

3. Waves

   • Descriptions waves
   • Properties of wave motions
   • Wave production ripple tank