Question

Application of total internal reflection​

Answer 1

Explanation:

Total internal reflection is also used in optical fibres. In telecommunications, copper cables are now replaced by fibre optic cables in the telephone system. ... Multiple signals can be sent at high speeds through bundles of fibres by using flashes of light from a laser.

Answer 2

Answer:

Let A {1, 2,3} . Then number of symmetric relations defined on A is