Q.1
Optical fibers can be used to transmit which of the following?
  • Light
  • Electrons
  • Protons
  • All of the above
Q.2
Which formula correctly states the relationship between refractive index and critical angle?
  • refractive index = 1⁄sin c
  • refractive index = 2⁄sin c
  • refractive index = 1⁄2 sin c
  • refractive index = 2⁄3 sin c
Q.3
Which of the following are examples of optical fibers?
  • Endoscope
  • Digital audio optical connection
  • Telephone exchange coupling
  • All of the above
Q.4
What is the critical angle of a medium if its refractive index is 1.5?
  • 40o
  • 41.8o
  • 50o
  • 51.8o
Q.5
Calculate the refractive index of a medium which has a critical angle of 52 .
  • 1.15
  • 1.27
  • 1.32
  • 1.44
Q.6
Which of the following is NOT an application of total internal reflection?
  • Endoscopes
  • Fiber Optic Broadband
  • Telescopes
  • Tacky Christmas Decorations!
Q.7
Lasers can be used for a variety of applications. Which of the following are lasers useful for?
  • Cutting
  • Cauterising
  • Burning
  • All of the above
Q.8
What is the normal range of sight for a human eye?
  • 25 cm to infinity
  • 5 cm to infinity
  • 10 cm to infinity and beyond
  • 25 cm to about 1 m
Q.9
What is a laser?
  • A device that generates an intense beam of coherent monochromatic light
  • A device that generates an intense beam of coherent bi-chromatic light
  • A device that absorbs an intense beam of coherent monochromatic light
  • A device that absorbs an intense beam of coherent bi-chromatic light
Q.10
What is the definition for critical angle in optics?
  • The angle below which total internal reflection occurs
  • The critical angle is the angle of incidence above which total internal reflection occurs
  • The angle between the normal and the angle of incidence
  • The angle between the normal and the angle of refraction
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