Calculate the broadcast wavelength of the radio station 99.90 fm. seconds

The radio waves are electromagnetic wave, so it travels with velocity of light i.e .

We can use the relation between frequency, wavelength and speed as

Here c is speed of light, is wavelength and f is frequency and its value is given 99.90 FM, it is actually in megahertz  (i.e 99.90 MHz).

Therefore,

.

Thus, the broadcast wavelength of the given radio station is 3.003 m.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this