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Home Q & A Board Science-Related Homework Help Physics
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mikael mikael
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10 years ago
Two radio antennas are  130 m apart on a north-south line. The two antennas radiate in phase at a frequency of  5.6 MHz. All radio measurements are made far from the antennas. The smallest angle, reckoned north of east from the antennas, at which destructive interference of the two radio waves occurs, is closest to: 
A) 12° 
B) 5.9° 
C) 8.9° 
D) 15° 
E) 18° 
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padrepadre
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10 years ago
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