Question

Explain the working and application of sonar.​

Answer 1

Answer:

the working and application of a sonar. ... Sonar is a device that uses ultrasonic waves to measure the distance, direction and speed of underwater objects. Principle: It uses the phenomenon of echoes in determining the sea-depth and locating the presence of under-water objects.

Answer 2

A school of historians like Irfan Habib, Satish Chandra etc have described the 18th century in India as dark age because there was total anarchy after the downfall of Mughal Empire. The old aged institutions of Mughals were declined and the disintegration of India lead emergence of fragmented kingdoms.