`A` particular radiostation broadcasts at a frequency of `1120` Kilo Hertz another radio station broadcasts at a frequency of `98.7` mega Hertz. What are the wave length of radiations from each station?

Answer

267.85 m, 3.0395 m

Explanation

In 2st case, `v = 1120 kHz = 1120 xx 10^(3)` cycles `s^(-1)` (1 kHz = `10^(3)` cycle `s^(-1)`)
`lamda = (c)/(v) = (3 xx 10^(8) ms^(-1))/(1120 xx 10^(3) s^(-1)) = 267.85 m`
In 2nd case, `v = 98.7 MHz = 98.7 xx 10^(6) " cycles " s^(-1) (1 MHz = 10^(6) " cycles " s^(-1))`