The maximum distance upto which TV transmission from a TV tower of height h can be received is proportional to
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A
If the height of the antenna is 
, then the maximum distance upto which the TV transmission for a TV tower can be received is proportional to 
.
Suppose that the height of the TV antenna be h and the radius of the earth be 
and 
. Let 
be a receiving station. In the limit 
, we can assume that 
is a tangent to the surface of the earth.
Then 
and so
as 
we neglect 
and so
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