Two radio antennas A and B radiate in phase.Antenna B is 160 m to theright of an

Question

Two radio antennas A and B radiate in phase.Antenna B is 160 m to theright of antenna A. Consider point Q along theextension of the line connecting the antennas, a horizontaldistance of 55 m to the right ofantenna B. The frequency,and hence the wavelength, of theemitted waves can be varied. (a) What is the longest wavelength for whichthere will be destructive interference at point Q?
1 m

(b) What is the longest wavelength for which there will beconstructive interference at point Q?
2 m (a) What is the longest wavelength for whichthere will be destructive interference at point Q?
1 m

(b) What is the longest wavelength for which there will beconstructive interference at point Q?
2 m

Explanation / Answer

a) (wave length)/2 = 160m

(wave length) = 320m

b) (wave length) = 160m

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