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A radio station broadcasts at a frequenc...

A radio station broadcasts at a frequency of 100 MHz. how long would it take to reach a receiving system at a distance of 300 km? calculate wavelength and wave number of these radiations.

Text Solution

Verified by Experts

Required time`=("Distance")/("Velocity")=(300xx1000)/(3xx10^(8))=1xx10^(-3)s` [`because`Velocity of any electromagnetic radiation `=3xx10^(8)m*s^(-1)`]
Wavelength of that radiation, `lamda=(c)/(v)=(3xx10^(8))/(100xx10^(6))=3m`
`[because 100MH z=100xx10^(6)Hz]`
Wave number `(overline(v))=1//lamda=1//3=0.33m^(-1)`
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