Question

What are Optical Fibres?

• A. Pipes/ Fibres which can transmit light over short distances as they are hollow
• B. Pipes/ Fibres which can transmit light over long distances as they are hollow
• C. Solid Pipes/ fibres which can transmit light over long distances by multiple TIR’s
• D. Solid pipes/ fibres which can transmit light over long distances with the help of TIR once
• E. Solid Pipes/ fibres which can transmit light over long distances based on the principle of Critical Phenomenon.

Answer 1

The correct option is C

Solid Pipes/ fibres which can transmit light over long distances by multiple TIR’s

Optical fibres or light pipes are solid fibres used for transmitting light signals over long distances without any loss of intensity.

It is based on the principle of TIR. Light is transmitted from one end to another with the same intensity due to multiple TIR’s within the fibre.

They are used for telecommunications, internet & in medicine for diagnosis & surgeries.