Question

Collect information on working of optional fibres. Prepare a report about various uses of optical fibres in our daily life.

Answer 1

1. Total internal reflection is the basic principle behind working of an optical fiber.

2. An optical fiber is a very thin fiber made of glass or plastic having the radius about a 10-6 meter.

3. A bunch of such thin fibers forms a light pipe.

Working:-

1. Because of a small radius of the fiber, a light goes into it makes a nearly glancing incidence on the wall.

2. The angle of incidence is greater than the critical angle and hence total internal reflection takes place.

3. The light is thus transmitted along the fiber.

Uses:-

1. Optical fibers are used in endoscopy to see the internal organs of our body.

2. Optical fibers are used in transmitting communication signals through light pipes.

3. Optical fibers are used in international telephone cables laid under the sea, in a large computer network, etc.

4. Optical fibers are used in photometric sensors to measuring blood flow in the heart.