Question

Which of the following is not true of all waves?Waves carry energy from one place to another.Waves need a mechanical medium through which to propogate.Waves can be used to carry infomation across distances.For a wave propagating in a given medium, wavelength is inversely proportional to frequency.

Answer 1

Given:

Some statements about the waves

To find:

The statement which is not true of all waves

Step-by-step explanation:

The waves carry energy from one place to another. The wavelength of a wave is,

`\lambda=(v)/(f)`

Here, 'v' is the speed of the wave and 'f' is the frequency of the wave.

So, the wavelength is inc=versely proportional to frequency in a given medium.

The waves line electromagnetic waves do not need any mechanical medium to propagate, they can travel without any media.

Hence, the statement "Waves need a mechanical medium through which to propogate" is not true.