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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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(a) What is the wavelength ofradio waves used in an MRI unit? (b) If the frequencies are swept over arange centered on, what is the range of wavelengths broadcast?
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?
Your friend says that more patterns and colors can be seen on the wings of birds if viewed in ultraviolet light. Would you agree with your friend? Explain your answer.
(a) What is the frequency of the \(193 - nm\)ultraviolet radiation used in laser eye surgery? (b) Assuming the accuracy with which this EM radiation can ablate the cornea is directly proportional to wavelength, how much more accurate can this UV be than the shortest visible wavelength of light?
If you wish to detect details of the size of atoms (about ) with electromagnetic radiation, it must have a wavelength of about this size. (a) What is its frequency? (b) What type of electromagnetic radiation might this be?
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