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A radar has a power of 1kW and is operat...

A radar has a power of `1kW` and is operating at a frequency of `10 GHz`. It is located on a mountain top of height `500m`. The maximum distance upto which it can detect object located on the surface of the earth (Radius of earth `6.4xx10^(6)m`) is

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Hence `h=500m`
`R=6400km=6.4xx10^(6)m`
`:.` Coverage range,
`d=sqrt(2hR)`
`=sqrt(2xx500xx6.4xx10^(6))`
`80xx10^(3)m=80km.`
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