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Chapter 24: Q10CQ (page 886)
Can an antenna be any length? Explain your answer
The size of the antenna shouldn't be of any length.
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Show that, when SI units for \({\mu _0}\) and \({\varepsilon _0}\) are entered, the units given by the right-hand side of the equation in the problem above are \(m/s\).
Explain why people who have the lens of their eye removed because of cataracts are able to see low-frequency ultraviolet.
The direction of the electric field shown in each part of the Figure 24.5is that produced by the charge distribution in the wire. Justify the direction shown in each part, using the Coulomb force law and the definition of E=F/q, where qis a positive test charge.
What is the intensity of an electromagnetic wave with a peak electric field strength of 125V/m?
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)?
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