COLLEGE PHYSICS,V.2
COLLEGE PHYSICS,V.2
11th Edition
ISBN: 9781305965522
Author: SERWAY
Publisher: CENGAGE L
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Chapter 28, Problem 51AP

(a)

To determine

The power per unit area at the retina.

(b)

To determine

The energy delivered to per pulse to an area of molecular size.

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A laser used in eye surgery emits a 3.00-mJ pulse in 1.00 ns, focused to a spot 30.0 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.) (b) What energy is delivered per pulse to an area of molecular size (say, a circular area 0.600 nm in diameter)?
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A laser used in eye surgery emits a 3.00 - mJ pulse in 1.00 ns, focused to a spot 30.0 mewm in diameter on the retina. (a) Find (in SI units) the power per unit area at the retina. (This quantity is called the irradiance.) (b) What energy is delivered per pulse to an area of molecular size (say, a circular area 0.600 nm in diameter)?
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