Two Radio Antennas Are 120 M Apart on a North-South

question 8

Multiple Choice

Two radio antennas are 120 m apart on a north-south line,and they radiate in phase at a frequency of 3.4 MHz.All radio measurements are made far from the antennas.If the east-west reference line passes midway between the two antennas,what is the smallest angle from the antennas,measured north of east,at which constructive interference of two radio waves occurs? (c = 3.00 × 10⁸ m/s)

• A) 43°
• B) 22°
• C) 68°
• D) 47°
• E) 30°

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