Which one is not the advantage of optical fibre?

CONCEPT:

• Optical Fibre: An optical fibre is a thin fibre of glass or plastic that can carry light from one end to the other. The study of optical fibres is called fibre optics. It is based on total internal reflection.

• Total internal reflection: The complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle.
• Advantages of Fibre optics:
  • Bandwidth is higher than copper cables.
  • Less power loss and allows data transmission for longer distances.
  • The optical cable is resistant to electromagnetic interference.
  • The size of the fibre cable is 4-5 times better than copper wires.
  • These cables are lighter, thinner, and occupy less area compare with metal wires.
  • Installation is very easy due to less weight.
  • A fibre optic cable is very flexible, easily bends, and opposes most acidic elements that hit the copper wire.

EXPLANATION:

• Bandwidth is higher than copper cables.
• Less power loss and allows data transmission for longer distances.
• A fibre optic cable is very flexible, easily bends, and opposes most acidic elements that hit the copper wire. So statement 3 is wrong.
• The size of the fibre cable is 4-5 times better than copper wires.

So option 3 is correct.