Question

Two waves are travelling through the same container of nitrogen gas. Wave A has a wavelength of 1.5m. Wave B has a wavelength of 4.5m. The speed of wave B must be __________ the speed of wave A.

One-ninth


One-third


The same as


Three times larger than

Answer 1

as speed is equal to wavelength * frequency

so, speed is directly propostional to wavelength keeping frequency constant..

in above question wavelength of B is 3 times of wave A, so speed will also be 3 times

hope this helped

Answer 2

Wavelength is directly proportional to the speed of the wave, so if the wavelength of B is three times than that of A, then it's speed would be it's three time as well.

In short, Your Answer would be: Option D) Three times larger than

Hope this helps!