Wave Interference at Radio Station Antennas

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SUMMARY

The discussion focuses on wave interference from two radio station antennas broadcasting at a frequency of 536 kHz. The first antenna is located 7.00 km from the listener's house, while the second antenna is positioned 8.12 km away. The wavelength of the electromagnetic wave is calculated to be 560 meters. Constructive interference occurs when the path difference between the two waves is an integer multiple of the wavelength, while destructive interference occurs when the path difference is a half-integer multiple of the wavelength.

PREREQUISITES
  • Understanding of wave properties, specifically wavelength and frequency.
  • Knowledge of electromagnetic wave behavior and interference patterns.
  • Familiarity with the equation v = fλ, where v is wave speed, f is frequency, and λ is wavelength.
  • Basic skills in solving problems involving trigonometric functions and integer multiples.
NEXT STEPS
  • Calculate the path difference for the two antennas using the formula for constructive and destructive interference.
  • Explore the principles of wave interference in more detail, focusing on phase relationships.
  • Investigate the impact of antenna placement on signal strength and quality.
  • Learn about the applications of wave interference in telecommunications and broadcasting.
USEFUL FOR

Students studying physics, particularly those focusing on wave mechanics, as well as engineers and technicians involved in radio frequency transmission and antenna design.

llamajuice
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Homework Statement


The transmitting antenna for a radio station is 7.00km from your house. The frequency of the electromagnetic wave broadcast is 536kHz. The station builds a 2nd transmitting antenna that broadcasts an identical em wave in phase with the 1st one. The new antenna is 8.12km from your house. Show whether constructive or destructive interference occurs at your radio.

Homework Equations


v=f╗
v = c = 3 x 10^8 m/s

The Attempt at a Solution


So I found the wavelength: v/f 5.6x 10^2m, but I don't know how to tell when constructive or destructive interference occurs.
 
Last edited:
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u r lacking some quantities. The question should also include where is the 2nd transmitting antenna. Let it be d
Then if u find that d=m(lambda) where m=0,1,2... then its a constructive interference.
 
Oh I forgot to put that the new antenna is 8.12km from the house.
So if d = m(lambda) its constructive interference and if d just doesn't = m(lambda) then its destructive interference?
 
no if d=(m+1/2)(lambda) then it will be destructive. also if both doesn't follow then it will be intermediate between two
 
oh ok its a constructive.. as 1120/560 = 2.
 

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