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Chapter 23: Q39 P (page 991)
The index of refraction of water is . At what speed would a wave crest in a beam of light travel through this medium?
The speed of wave in the water is .
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At dawn, with the Sun just rising in the east, you facethe Sun and bend your head back to look straight up, and youexamine the blue sky light with a Polaroid® filter. Why is the lightpolarized? What is the direction of the electric field, east—west ornorth—south? Explain carefully
A proton is accelerated in the direction shown by the arrow labeled \(\vec a\) in Figure 23.118. Which of the arrows labeled A–F correctly shows the direction of the vector \({\vec a_ \bot }\)at the observation location indicated by the vector \(\vec r\)?
A small laser used as a pointer produces a beam of red light in diameter and has a power output of . What is the magnitude of the electric field in the laser beam?
A pulse of radiation propagates with velocity . The electric field in the pulse is . What is the magnetic field in the pulse?
The wavelength of red light is about . What are the frequency and period of this radiation?
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