In a mobile phone network, how many times as strong would a signal be expected to be at 200 m from a base station, compared with at 600 m?
My answer is 81, is it right?
700/400
Looks like someone is cheating on their T215 CMA. Work it out for yourself!
To determine how many times stronger a signal is expected to be at a certain distance from a base station compared to another distance, we need to consider the inverse square law.
The inverse square law states that the signal strength decreases with the square of the distance. This means that if you double the distance from a base station, the signal strength will be reduced to one-fourth (1/2^2) of its original value.
In this case, we have two distances: 200 m and 600 m.
First, let's calculate the reduction in signal strength from 200 m to 600 m:
(600 m / 200 m)^2 = (3)^2 = 9
So, the signal strength at 600 m would be expected to be 9 times weaker compared to 200 m.
Now, for the question of how many times stronger the signal is at 200 m compared to 600 m, we take the reciprocal:
1 / 9 = 0.111...
Therefore, the signal at 200 m would be expected to be approximately 0.111 times stronger compared to 600 m.
So, your answer of 81 is not correct. The signal at 200 m is expected to be approximately 0.111 times stronger compared to 600 m.