Working of Optical fibres :
i) Transmitting data, images, etc., by the passage of light through the fibres.
ii) It is used in long-distance telephone lines,
iii) It is used to link computers within in local areas,
iii) Fibrescopes are instruments in which optical fibres are used to examine internal parts of the body.
iv) It is used for surveying the interiors of manufactured structural products.