Q1 of 8 Page 23

Observe the graph.


What is the frequency of the wave?

Frequency: It is defined as the rate of vibration constituting a wave or time taken by the number of vibration. That is mathematically it is the reciprocal of the time period of the one complete vibration of the wave.

S.I. unit = hertz


Formula used:


also, we know that speed = wavelength × frequency


⇒ wavelength = 4 m {from the figure, because one complete cycle = wavelength, as shown below:)




More from this chapter

All 8 →
1

Observe the graph.


Find out the amplitude of the wave.

 1

Observe the graph.


What is the speed of the wave if it travels 800 m in 2 s?

 2

What do you mean by acoustics of buildings? Suggest four steps that can be taken, while constructing buildings, to avoid problems that may occur due to multiple reflection of sound.

 3

A sound signal from a ship floating on water, hits a rock at the bottom of the sea and comes back to the ship after 4 s. Calculate the distance of the rock from the surface of water. The speed of sound in water is estimated to be 1500 m/s.