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Chapter 33: Q10P (page 1001)
A plane electromagnetic wave has a maximum electric field magnitude of. Find the magnetic field amplitude.
The magnetic field amplitude is .
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Figure 33-28 shows the electric and magnetic fields of an electromagnetic wave at a certain instant. Is the wave traveling into the page or out of the page?
In Fig. 33-41, a beam of light, with intensityand polarization parallel to a y-axis, is sent into a system of two polarizing sheets with polarizing directions at angles of and to the y axis. What is the intensity of the light transmitted by the two-sheet system?
In Fig. 33-42, unpolarized light is sent into a system of three polarizing sheets, which transmitsthe initial light intensity. The polarizing directions of the first and third sheets are at anglesand.What are the
(a) smaller and
(b) larger possible values of anglefor the polarizing direction of sheet 2?
In the figure, initially unpolarized light is sent into a system of three polarizing sheets whose polarizing directions make angles ofwith the direction of theyaxis. What percentage of the initial intensity is transmitted by the system? (Hint: Be careful with the angles.)
Figure:
Sunlight just outside Earth’s atmosphere has an intensity of. Calculate (a) and (b)for sunlight there, assuming it to be a plane wave.
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