Chapter 24: Q30PE (page 889)
What is the intensity of an electromagnetic wave with a peak electric field strength of 125V/m?
Short Answer
The intensity is.
Chapter 24: Q30PE (page 889)
What is the intensity of an electromagnetic wave with a peak electric field strength of 125V/m?
The intensity is.
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Get started for freeLaser vision correction often uses an excimer laser that produces electromagnetic radiation. This wavelength is extremely strongly absorbed by the cornea and ablates it in a manner that reshapes the cornea to correct vision defects. Explain how the strong absorption helps concentrate the energy in a thin layer and thus give greater accuracy in shaping the cornea. Also, explain how this strong absorption limits damage to the lens and retina of the eye.
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On its highest power setting, a microwave oven increases the temperature of 0.004 kgof spaghetti by in 120 s. (a) What was the rate of power absorption by the spaghetti, given that its specific heat isrole="math" localid="1655872138905" ? (b) Find the average intensity of the microwaves, given that they are absorbed over a circular area 20.0 cmin diameter. (c) What is the peak electric field strength of the microwave?(d) What is its peak magnetic field strength?
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