During the Cold War, American submarines operated as "lone wolves" at extreme ocean depths for many months at a time.Ordinary radio signals are greatly attenuated at such depths, making communication with the submarines difficult. One waysuggested to communicate with the submarines was a program the Navy called Seafarer that used extremely low frequencywaves. If the Seafarer transmitter broadcast at 82 Hz, what would the transmitter's quarter wavelength antenna have to be inorder to receive the signal?km

Given:frequency of signals f=82 Hz signals: radio signal v=c=3*108 m/s

During the Cold War, American submarines operated as "lone wolves" at extreme ocean depths for many months at a time Ordinary radio signals are greatly attenuated at such depths, making communication with the submarines difficult. One w. suggested to communicate with the submarines was a program the Navy called Seafarer that used extremely low frequen waves. If the Seafarer transmitter broadcast at 82 Hz, what would the transmitter's quarter wavelength antenna have to order to receive the signal? km

During the Cold War, American submarines operated as "lone wolves" at extreme ocean depths for many months at a time Ordinary radio signals are greatly attenuated at such depths, making communication with the submarines difficult. One w. suggested to communicate with the submarines was a program the Navy called Seafarer that used extremely low frequen waves. If the Seafarer transmitter broadcast at 82 Hz, what would the transmitter's quarter wavelength antenna have to order to receive the signal? km

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter24: Electromagnetic Waves

Section: Chapter Questions

Problem 48P

See similar textbooks

Similar questions

A radio station broadcasts its radio waves with a power of 50,000 W. What would be the intensity of this signal if it is received on a planet orbiting Proxima Centuri, the closest star to our Sun, at 4.243 ly away?
An outdoor WIFi unit for a picnic area has a 100-mW output and a range of about 30 m. What output power would reduce its range to 12 m for use with the same devices as before? Assume there are no obstacles in the way and that microwaves into the ground are simply absorbed.
Assume (unrealistically) that a TV station acts as a point source broadcasting isotropically at 2.5 MW. What is the intensity of the transmitted signal reaching a nearby star that is 44 ly away. (An alien civilization at that distance might be able to watch X Files.) A light-year (ly) is the distance light travels in one year. Number Units Use correct number of significant digits; the tolerance is +/-1 in the 2nd significant digit
(a) What would a small T.V. antenna suggest about the broadcast signal it is designed to receive?(b) A radio station in Sydney broadcasts at 9.67 MHz. What would be the length of its antenna if this is exactly half a wavelength long?
Assume (unrealistically) that a TV station acts as a point source broadcasting isotropically at 1.0 MW.What is the intensity of the transmitted signal reaching Proxima Centauri, the star nearest our solar system, 4.3 ly away? (An alien civilization at that distance might be able to watch X Files.) A light-year (ly) is the distance light travels in one year.
As space exploration increases, means of communicationwith humans and probes on other planets are being developed.(a) How much time (in s) does it take for a radio wave of fre-quency 8.93x10^7s⁻¹ to reach Mars, which is 8.1x10^7km from Earth? (b) If it takes this radiation 1.2 s to reach the Moon, howfar (in m) is the Moon from Earth?
A0.5 MHz antenna carried by an airplane flying over the ocean surface generates a wave that approaches the water surface in the forme a normally incident plane wave with an electric-field amplitude of 5500 V/m. Seawater is characterized by a dielectric constant of 72, relative permeabity of 1 and conductivity of 4 Slm. The plane is trying to communicate a message to a submarine submerged at a depth d below the water surface. If the submarine's receiver requires a minimum signal ampitude of 0.03 u Vim), what is the maximum depth d to which successful communication is still possible? Answer
How many minutes would it take a radio wave to travel from the planet Venus to Earth? (Average distance from Venus to Earth = 28 million miles). Determine also the frequency and energy emitted.