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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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Question: What is the radiation pressure 1.5maway from a 500wlight bulb? Assume that the surface on which the pressure is exerted faces the bulb and is perfectly absorbing and that the bulb radiates uniformly in all directions.
In Fig. 33-78, where , ,and,light refracts from material 1 into material 2. If it is incident at point A at the critical angle for the interface between materials 2 and 3, what are (a) the angle of refraction at pointBand (b) the initialangle?If, instead, light is incident atBat the critical angle for the interface between materials 2 and 3, what are (c) the angle of refraction at pointAand (d) the initial angle? If, instead of all that, light is incident at point Aat Brewster鈥檚 angle for the interface between materials 2 and 3, what are (e) the angle of refraction at point B and (f) the initialangle?
Question: (a) How long does it take a radio signal to travel from a transmitter to a receiving antenna? (b) We see a full Moon by reflected sunlight. How much earlier did the light that enters our eye leave the Sun? The Earth鈥揗oon and Earth鈥揝un distances are and , respectively. (c) What is the round-trip travel time for light between Earth and a spaceship orbiting Saturn, distant? (d) The Crab nebula, which is about light years (ly) distant, is thought to be the result of a supernova explosion recorded by Chinese astronomers in A.D. 1054. In approximately what year did the explosion actually occur? (When we look into the night sky, we are effectively looking back in time.)
What inductance must be connected to acapacitor in an oscillator capable of generating(i.e., visible) electromagnetic waves? Comment on your answer.
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:
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