(a) What is the intensity in W/m 2 of a laser beam used to burn away cancerous...
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(a) What is the intensity in W/m2 of a laser beam used to burn away cancerous tissue that, when 90.0% absorbed, puts 500 J of energy into a circular spot 2.00 mm in diameter in 4.00 s?
(b) Discuss how this intensity compares to the average intensity of sunlight (about 700 W/m2) and the implications that would have if the laser beam entered your eye. Note how the amount of damage depends on the time duration of the exposure.
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a To calculate the intensity of the laser beam we can use the formula Intensity Power Area where Intensity is the intensity in watts per square meter ...View the full answer
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