If the radio station is broadcasting at a wavelength A and the distance between the two radio towers is equal to a, then the intensity I of the signal in the direction 0 is given by I =-1[1+cos(7 sin 0)] + Cos ( T where is the maximum intensity. a) Approximate I in terms of I, for each 0. i. 0 = 0 i. %3D 0 = 3 ii. 0 = T 7 -폭

If the radio station is broadcasting at a wavelength A and the distance between the two radio towers is equal to a, then the intensity I of the signal in the direction 0 is given by I =-1[1+cos(7 sin 0)] + Cos ( T where is the maximum intensity. a) Approximate I in terms of I, for each 0. i. 0 = 0 i. %3D 0 = 3 ii. 0 = T 7 -폭

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter24: Wave Optics

Section: Chapter Questions

Problem 7P: Two radio antennas separated by d = 3.00 102 cm. as shown in Figure P24.7, simultaneously broadcast...

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Radio telescopes are telescopes used for the detection of radio emission from space. Because radio waves have much longer wavelengths than visible light, the diameter of a radio telescope must be very large to provide good resolution. For example, the radio telescope in Penticton, BC in Canada, has a diameter of 26 m and can be operated at frequencies as high as 6.6 GHz. (a) What is the wavelength corresponding to this frequency? (b) What is the angular separation of two radio sources that can be resolved by this telescope? (c) Compare the telescope’s resolution with the angular size of the moon.
Two radio antennas separated by d = 3.00 102 cm. as shown in Figure P24.7, simultaneously broadcast identical signals at the same the signals. (a) If the car is at the position of the second maximum wavelength. A car travels due north along a straight line at position x = 1.00 103 m from the center point between the antennas and its radio receives the signal. (a) If the car is at the position of the second maximum after that at point O when it has traveled a distance of y = 4.00 102 m northward, what is the wavelength of the signals? (b) How much farther must the car travel from thus position to encounter the next minimum in reception? Hint: Do not use the small-angle approximation in this problem.
Two radio antennas separated by d = 3.00 102 cm. as shown in Figure P24.7, simultaneously broadcast identical signals at the same the signals. (a) If the car is at the position of the second maximum wavelength. A car travels due north along a straight line at position x = 1.00 103 m from the center point between the antennas and its radio receives the signal. (a) If the car is at the position of the second maximum after that at point O when it has traveled a distance of y = 4.00 102 m northward, what is the wavelength of the signals? (b) How much farther must the car travel from thus position to encounter the next minimum in reception? Hint: Do not use the small-angle approximation in this problem.
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