Project Seafarer was an ambitious program to construct an enormous antenna, buried underground on a site about 10000 km² in area. Its purpose was to transmit signals to submarines while they were deeply submerged. If the effective wavelength were 1.5 x 10° Earth radii, what would be the (a) frequency and (b) period of the radiation emitted? Ordinarily, electromagnetic radiations do not penetrate very far into conductors such as seawater. Take the Earth's radius to be 6370 km.

Project Seafarer was an ambitious program to construct an enormous antenna, buried underground on a site about 10000 km² in area. Its purpose was to transmit signals to submarines while they were deeply submerged. If the effective wavelength were 1.5 x 10° Earth radii, what would be the (a) frequency and (b) period of the radiation emitted? Ordinarily, electromagnetic radiations do not penetrate very far into conductors such as seawater. Take the Earth's radius to be 6370 km.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

An electromagnetic wave with an amplitude of 8.00 V/m boils a cup of water in 4.00 minutes. (The units for the amplitude are here because we always need units, but they are not relevant to answering the question). If the amplitude was increased to 16.0 V/m, but everything else (e.g., frequency, distance of cup from source etc.) stayed the same, how long would it take to boil the same cup of water? Enter your answer in minutes.
Radiation from the sun reaching the earth has an intensity of 1.4 kW/m^2. a) What is the total power radiated by the sun? (The sun is 1.5 x 10^11 m from earth.) b) Assuming all the incident energy is absorbed, what is the force on the earth due to radiation pressure?
The magnetic field for an EM wave is given by the following equation: Bz= (−8μT) cos((9.67×107m−1)z−(ω rad/s)t) Find: (a) The frequency and wavelength of the wave b) The direction of travel (c) The direction of the E field (d) The amplitude of the E field (e) Write an equation for the E filed for this wave
During normal beating, a heart creates a maximum 3.85-mV potential across 0.285 m of a person’s chest, creating a 1.1-Hz electromagnetic wave. During normal beating of the heart, the maximum value of the oscillating potential difference across 0.285 m of a person’s chest is 3.85 mV. This oscillating potential difference produces a 1.1-Hz electromagnetic wave. What is the wavelength, in meters, of the electromagnetic wave?
A traveling electromagnetic wave in a vacuum has an electric field amplitude of 91.5 V/m. Calculate the intensity ? of this wave. Then, determine the amount of energy ? that flows through area of 0.0203 m2 over an interval of 15.7 s, assuming that the area is perpendicular to the direction of wave propagation.
The magnetic component of an electromagnetic wave in vacuum has an amplitude of 95.0 nT and an angular wave number of 2.49 m-1. What are (a) the frequency of the wave, (b) the rms value of the electric component, and (c) the intensity of the light?
What inductance must be connected to a 25 pF capacitor in an oscillator capable of generating 490 nm (i.e., visible) electromagnetic waves?
A certain 60.0 Hz AC power line radiates an electromagnetic wave having a maximum electric field strength of 45.2 kV/m. (a) What is the wavelength of this very low frequency electromagnetic wave? (b) What is its maximum magnetic field strength?