Q1 of 16 Page 22

In an unoccupied hall of a courtly you will experience the echo effect of sound. If the same hall is furnished with almirahs, tables, chairs, and other commodities, you may not experience the echo clearly. It is because,

An echo is a sound that is repeated because the sound waves are reflected back. In an empty room, sound waves repeatedly reflect from the walls and ceilings of the room. When the room gets occupied, the furniture absorbs the sound waves and the sound waves will not get reflected.

More from this chapter

All 16 →
1

Imagine that you are listening to a popular song from a radio. Using volume control knob, you slightly increase the volume. The factor related to sound wave in this process is, increase in

 1

The velocity of sound is highest in

 1

The factor that is transmitted in wave motion is,

 2

Fill in the blanks with suitable words :

The product of frequency and wavelength of a sound wave is equal to its ___________ .