A wave has a wavelength of 3 mm and a frequency of 4 Hz. At what speed does the wave travel?

2 Answers

justaguide's profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted on

The relationship between the wavelength, frequency and speed of a wave is c = L*F, where c is the wave velocity, L is the wavelength and F is the frequency.

Here the wavelength is given as 3 mm and the frequency is 4 Hz or 4 per second, this gives the wave velocity as

c = 3*10^-3*4 = 12*10^-3 m/s.

The given information can be interpreted as 4 waves with a wavelength of 3 mm can pass in a second.

We see from the equation given earlier that for a constant velocity, waves with a higher wavelength have a lower frequency and those with a higher frequency have a smaller wavelength.

muzhdah's profile pic

muzhdah | Student, Grade 9 | (Level 1) Honors

Posted on

Explain how you know your answer is correct?

And what exactly is the asnwer?

Thanks IN Advance!