The transmitters emit the same 120 kHz signal as before, and the signals overlap when they reach the mobile receiver but... After traveling an unknown distance, d₁, one signal arrives at the receiver while the other bounces off a skyscraper. The signal that bounced off the skyscraper then travels an additional distance, d₂, to the receiver as shown in the figure.
The transmitters emit the same 120 kHz signal as before, and the signals overlap when they reach the mobile receiver but... After traveling an unknown distance, d₁, one signal arrives at the receiver while the other bounces off a skyscraper. The signal that bounced off the skyscraper then travels an additional distance, d₂, to the receiver as shown in the figure.
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Transcribed Image Text:The transmitters emit the same 120 kHz signal as before, and
the signals overlap when they reach the mobile receiver but ...
After traveling an unknown distance, d₁, one signal arrives at
the receiver while the other bounces off a skyscraper.
The signal that bounced off the skyscraper then travels an
additional distance, d₂, to the receiver as shown in the figure.
d₂
d₁
d₁
Transcribed Image Text:(a) Which one or more of the following affected the phase difference between the two signals at the receiver?
O The reflection off the skyscraper.
O The path length difference, Id₂ - d₁l
O The initial distance, d₁, that both waves traveled.
O The distance, d₂, traveled by the reflected signal.
(b) If the signals started out in phase, which condition will give constructive interference?
o dz
= m O
What minimum value of d₂ gives constructive interference?
km
O
(c) If the signals were initially out of phase, which condition will give constructive interference?
d₂ = m
λ
What minimum value of d₂ gives constructive interference?
km
= m + 1
O
dz
= m + 12
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