42. A certain radio station broadcasts a frequency of 900 klHz. The wa

1.	42. A certain radio station broadcasts a frequency of 900 klHz. The wavelength of electromagnetic radiation broadcast bythe radio station is:A) 900 mB) 270 mC) 2.70 kmD) 330 m
Answer» The frquency of the radiation emmited. v = 900 kHz = 900 * 103Hz = 900 * 103s-1 We know that wavelength * frequency = velocity (constant) Or wavelength = velocity / frequency where velocity = 3.0 * 108m s-1 wavelength = 3.0 * 108m s-1/ 900 * 103s-1 wavelength = 3 / 90 * 104m = 333m Thus, wavelength of radiowave brodcast by the station is 333m...

42. A certain radio station broadcasts a frequency of 900 klHz. The wavelength of electromagnetic radiation broadcast bythe radio station is:A) 900 mB) 270 mC) 2.70 kmD) 330 m

Answer»

The frquency of the radiation emmited.

v = 900 kHz = 900 * 103Hz

= 900 * 103s-1

We know that wavelength * frequency = velocity (constant)

Or wavelength = velocity / frequency

where velocity = 3.0 * 108m s-1

wavelength = 3.0 * 108m s-1/ 900 * 103s-1

wavelength = 3 / 90 * 104m = 333m

Thus, wavelength of radiowave brodcast by the station is 333m...