Question

The wavelength of a wave is 20 cm. If its velocity is 25 ms-1, calculate its frequency. [​

Answer 1

Answer:

Explanation:

Answer

In the question, the wavelength (λ) is given as 20 cm, that is, 0.20 m and the wave velocity, v is given as 24 m/s.

The frequency ν, velocity v and wavelength λ relation is given as:

ν=  

λ

v

​  

.

Number of waves produced in one second is called as frequency, i.e. ν=  

λ

v

​  

 =ν=  

0.20

24

​  

 =120 waves per second.

Time period of a wave is given as the inverse of frequency.  

That is, T=  

ν

1

​  

 =  

120

1

​  

 =8.33×10  

−3

 seconds

Hence, the time period of the wave is given as 8.33×10  

−3

 seconds.