Introduction To Health Physics
Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 14, Problem 14.37P

(a)

To determine

MPE for intrabeam viewing.

(b)

To determine

The value of Nominal ocular hazard distance(NOHD).

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A laser used in eye surgery emits a 3.60-mJ pulse in 1.00 ns, focused to a spot 45.0 µm in diameter on the retina. (a) Find (in SI units) the power per unit area at the retina. (This quantity is called the irradiance.)_________ W/m2(b) What energy is delivered per pulse to an area of molecular size (say, a circular area 0.400 nm in diameter)?___________ J
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