Television signals reach us only through ground waves. The range R is related to the height h of the transmitter antenna as

Options

A. `R alpha h^(1//3)`
B. `R alpha h^(1//2)`
C. `R alpha h^2`
D. `R alpha h`

Answer

B

Explanation

`(r+h)^2-r^2=R^2`
`therefore R^2=2r h + h^2`

Second term on the rt.hand side is negligible as compared to the first term
`therefore R alpha sqrth`