A radio broadcast antenna is 36.00 km from your house Suppose an airplane is flying 2.230 km above me line connecting the broadcast antenna and your radio and that waves reflected from the airplane travel 88.00 wavelengths farther than waves that travel directly from the antenna to your house, (a) Do you observe constructive or destructive interference between the direct and reflected waves? ( Hint Does a phase change occur when the waves are reflected?) (b) The situation just described occurs when the plane is above a point on the ground that is two thirds of the way from the antenna to your house. What is the wavelength of the radio waves?
A radio broadcast antenna is 36.00 km from your house Suppose an airplane is flying 2.230 km above me line connecting the broadcast antenna and your radio and that waves reflected from the airplane travel 88.00 wavelengths farther than waves that travel directly from the antenna to your house, (a) Do you observe constructive or destructive interference between the direct and reflected waves? ( Hint Does a phase change occur when the waves are reflected?) (b) The situation just described occurs when the plane is above a point on the ground that is two thirds of the way from the antenna to your house. What is the wavelength of the radio waves?
A radio broadcast antenna is 36.00 km from your house Suppose an airplane is flying 2.230 km above me line connecting the broadcast antenna and your radio and that waves reflected from the airplane travel 88.00 wavelengths farther than waves that travel directly from the antenna to your house, (a) Do you observe constructive or destructive interference between the direct and reflected waves? (Hint Does a phase change occur when the waves are reflected?) (b) The situation just described occurs when the plane is above a point on the ground that is two thirds of the way from the antenna to your house. What is the wavelength of the radio waves?
A person driving at v = 16 m/s crosses the line
What is the longest possible wavelength of the radio waves?
connecting two radio transmitters at right angles, as
shown in the figure(Figure 1). The transmitters emit
identical signals in phase with each other, which the
driver receives on the car radio. When the car is at point
Express your answer using two significant figures.
A, the radio picks up a maximum net signal.
Hνα ΑΣφ
m
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• Part B
Figure
How long after the car passes point A does the radio experience
wavelength has the value found in part A.
minimum in the net signal? Assume that the
Express your answer using two significant figures.
V ΑΣφ
?
t =
450 m
-150 m
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Assig
Cengage Learning
VHF, or very high frequency, refers to radio frequency electromagnetic waves in the range 30 to 300 MHz. In the U.S., television stations broadcast channels 2 through 13 in the VHF range betwe-
54.0 MHz and 216 MHz, with ranges 72.0 to 76.0 MHz and 88.0 to 174 MHz not utilized for TV broadcasting. Each channel has a frequency width of 6.00 MHz. The table below gives the lower and
upper frequency of each channel.
Channel
2
3
4
5
6
80
9
10
11
12
13
Lower edge (MHz) Upper edge (MHz)
54
60
66
76
82
174
180
186
192
198
204
210.
m
m
m
60
m
66
72
EE
82
88
180
186
192
(a) Calculate the broadcast wavelength range for channel 2. (Enter your answers from smallest to largest, in m.)
smallest value
largest value
198
204
210
(b) Calculate the broadcast wavelength range for channel 5. (Enter your answers from smallest to largest, in m.).
smallest value
largest value
216
(c) Calculate the broadcast wavelength range for channel 6. (Enter your answers from smallest to largest, in…
Physics
Time delay to Jupiter
A radio pulse is sent from the Earth, reflected off a satellite of Jupiter (the satellite is a point), and received on Earth. Jupiter is a distance r2 from the Sun, the Earth is a distance r1. Assume that Jupiter is on the other side of the Sun relative to the Earth. Let r0 be the distance of closest approach of the radio pulse to the Sun. Calculate the gravitational delay in the round-trip time of the radio pulse as a function of r0, to lowest order in G.
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