waves

• transverse

  perpendicular (ripples/electromag)
• longitudinal

  parallel (sound/shock)
• specular

  flat
• diffuse

  bumpy, reflect diff directions
• refract

  denser= slower (close to normal)
• distance

  scalar, no direct
• displacement

  vector, direction in certain line
• waves electromag spectrum

  radio- tv

  micro- absorb water, vibrate

  IR- emit thermal

  visible- optic fibres

  UV- sun beds

  xray- radiation recieved

  gamma- ionise
• transparent

  transmit
• translucent

  low transmit
• opaque

  absorb/ reflect
• black body

  absorb all radiation
• shiny

  reflect
• matt/ black

  absorb/ emit
• hot

  low absorb/ high emit
• sound wave

  collide, vibrate

  dont travel in vacum- no particles to vibrate
• humans

  1. travel to ear canal
  2. vibrate to cochlea
  3. trans to elect signal
  4. 20 hz - 20 khz
• ultrasound

  above 20 khz

  low reflect
• p wave

  longitudinal
• s wave

  transverse
• propertys of earth

  1. travel in core
  2. detected
  3. see where absorb/ refelct