Question

The ratio of wave number of two radiations is 1:2 the ratio of their velocity is

Answer 1

Answer:

2

Explanation:

Wave number is the reciprocal of Wavelength

So the waves' wavelengths are in the ratio 1:2

Now according to the relation v=fw

You can see that velocity depends on both the frequency as well as wavelength

So here's your answer

Case-I: Frequencies are equal

Velocities are in the ratio 1:2

Case-II(more probable): Nothing is said about their frequencies almost certainly means they are travelling through the same medium in which case there VELOCITIES ARE EQUAL and it is their frequencies that are in the ratio 2:1

Answer 2

Answer:

Wave number is the reciprocal of Wavelength

So the waves' wavelengths are in the ratio 1:2

Now according to the relation v=fw

You can see that velocity depends on both the frequency as well as wavelength

So here's your answer

Case-I: Frequencies are equal

Velocities are in the ratio 1:2

Case-II(more probable): Nothing is said about their frequencies almost certainly means they are travelling through the same medium in which case there VELOCITIES ARE EQUAL and it is their frequencies that are in the ratio 2:1

Hope this helped