Revise GCSE Physics

P1d Light and Lasers

    Light and Optical Fibers

  1. Why was light used for communication historically?
  2. Why does using light to communicate require the use of a code?
  3. What is Morse code?
  4. Why is Morse code a digital code?
  5. What is an optical fiber?
  6. How do optical fibers work?
  7. Do optical fibers only guide visible light?
  8. What types of communications use optical fibers?
  9. How do optical fiber help us communicate?
  10. What applications are there for Total Internal Reflection (TIR) in fibre optics?
  11. What are the advantages and disadvantages of using light, infrared, microwaves, radio and electrical signals for communication?

Lasers and applications of laser light

  1. What is a laser?
  2. Is laser light different to other forms of light?
  3. What kind of beam of light does a laser produce?
  4. Why do most lasers produce an intense coherent beam of light?
  5. How do these unique properties of laser light make lasers useful?
  6. What is a CD?
  7. How does a CD work?
  8. Why must a laser beam be used to read the CD?
  9. What is the difference between a CD and a DVD?
  10. Can you summarise how a CD works?