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Chapter 31: Problem 58
What is the wavelength of the electromagnetic waves used for cell phone communications in the 850 -MHz band?
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Unpolarized light of intensity \(I_{0}\) is incident on a series of five polarizers, each rotated \(10.0^{\circ}\) from the preceding one. What fraction of the incident light will pass through the series?
A wire of radius \(1.0 \mathrm{~mm}\) carries a current of 20.0 A. The wire is connected to a parallel plate capacitor with circular plates of radius \(R=4.0 \mathrm{~cm}\) and a separation between the plates of \(s=2.0 \mathrm{~mm} .\) What is the magnitude of the magnetic field due to the changing electric field at a point that is a radial distance of \(r=1.0 \mathrm{~cm}\) from the center of the parallel plates? Neglect edge effects.
What is the distance between successive heating antinodes in a microwave oven's cavity? A microwave oven typically operates at a frequency of \(2.4 \mathrm{GHz}\).
An electric field of magnitude \(200.0 \mathrm{~V} / \mathrm{m}\) is directed perpendicular to a circular planar surface with radius \(6.00 \mathrm{~cm}\). If the electric field increases at a rate of \(10.0 \mathrm{~V} /(\mathrm{m} \mathrm{s}),\) determine the magnitude and the direction of the magnetic field at a radial distance \(10.0 \mathrm{~cm}\) away from the center of the circular area.
A laser beam takes 50.0 ms to be reflected back from a totally reflecting sail on a spacecraft. How far away is the sail?
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