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6. If the angle of incidence (i) is less than the critical angle...

  • There's quite a bit of total internal reflection
  • Most of the light passes out but a little is totally internally reflected
  • Little of the light passes out but a lot is totally internally reflected
  • All of the light is reflected

7. If the angle of incidence (i) is equal to the critical angle...

  • All of the light is reflected
  • Little of the light passes out but a lot is totally internally reflected
  • There's quite a bit of total internal reflection
  • Most of the light passes out but a little is totally internally reflected

8. If the angle of incidence (i) is greater than the critical angle...

  • There's quite a bit of total internal reflection
  • All of the light is reflected
  • Most of the light passes out but a little is totally internally reflected
  • Little of the light passes out but a lot is totally internally reflected

9. Which of these EM waves are not used in optical fibres

  • Infrared
  • Ultravoilet
  • Visible light

10. Optical fibres are wide in order to ensure the angle of incidence is above the critical angle.

  • False
  • True