How far apart at a minimum should a radio station,operating at 88.1 MHz,place a pair of antennae operating in phase such that no emission occurs along a line 45 degrees from the line joining the antennae?

Question

Quizplus · Accepted Answer

The minimum distance between antennae can be found using the formula:
Distance = wave length/2
The wavelength can be found using the formula:
wavelength = speed of light/frequency
Plugging in the values, we get:
wavelength = 3 x 10^8 m/s / 88.1 x 10^6 Hz = 3.41 m
So, the minimum distance between antennae would be:
Distance = 3.41 m/2 = 1.705 m
To ensure that no emission occurs along a line 45 degrees from the line joining the antennae, the distance between antennae must be at least equal to the wavelength. Therefore, the smallest integer multiple of the wavelength greater than 1.705 m would be 2.4 m (rounding up). So, the best choice is B.

How Far Apart at a Minimum Should a Radio Station,operating