The total internal reflection of waves

• conditions for TIR


  angle of incidence greater than critical and movement from a more dense to a less dense material
• which EM wave is used for satellites

  microwaves and infra red radiation
• describe an endoscope


  . uses optical fibres and CT scans use X rays.

  . used to investigate specific areas of the body

  . less harmful than CT scans
• describe an CT scan

  . used to generate more overall images of the body and are a higher risk than endoscopes as they use X rays.

  CT scans are 3D