Question

If a radio station transmits at 219 m wavelength and 1370 kHz frequency, calculate the velocity of waves.

Answer 1

Given :

Wavelength = 219 m

Frequency = 1370 K Hz

                  = 1370 × 10³ Hz

Keep it like this , we will change later ...

Formula

Velocity = frequency × wavelength

              = 219 m × 1370 × 10³ Hz

Now 219 m = 219/1000 km

                   = 0.219 km

So velocity = 0.219 km × 10³ × 1370 Hz

                  = 219 km × 1370 Hz

                  = 300030 km/s

                 

The velocity is 300030 km/s                  

Answer 2

c = v. x [ C = speed, v = frequency, x= wavelength]
so, c = 219 × 1370000=300030000...Answer