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Chapter 24: Q31PE (page 889)
Find the intensity of an electromagnetic wave having a peak magnetic field strength of .
The intensity is .
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Electromagnetic radiation having a \(15.0\mu m\)wavelength is classified as infrared radiation. What is its frequency?
A radio station utilizes frequencies between commercial AM and FM. What is the frequency of a 11.12-m-wavelength channel?
Lunar astronauts placed a reflector on the Moon's surface, off which a laser beam is periodically reflected. The distance to the Moon is calculated from the round-trip time. (a) To what accuracy in meters can the distance to the Moon be determined if this time can be measured to? (b) What percent accuracy is this, given the average distance to the Moon is?
What is the maximum electric field strength in an electromagnetic wave that has a maximum magnetic field strength of \(5.00 \times {10^{ - 4}}\;T\) (about \(10\) times the Earth's)?
Consider the most recent generation of residential satellite dishes that are a little less than half a meter in diameter. Construct a problem in which you calculate the power received by the dish and the maximum electric field strength of the microwave signals for a single channel received by the dish. Among the things to be considered are the power broadcast by the satellite and the area over which the power is spread, as well as the area of the receiving dish.
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