*60 The beam from an argon laser (of wavelength 515 nm) has a di- ameter d of 3.00 mm and a continuous energy output rate of 5.00 W. The beam is focused onto a diffuse surface by a lens whose focal length fis 3.50 cm. A diffraction pattern such as that of Fig. 36-10 is formed, the radius of the central disk being given by 1.22 fA R = (see Eq. 36-12 and Fig. 36-14). The central disk can be shown to con- tain 84% of the incident power. (a) What is the radius of the central disk? (b) What is the average intensity (power per unit area) in the incident beam? (c) What is the average intensity in the central disk?

*60 The beam from an argon laser (of wavelength 515 nm) has a di- ameter d of 3.00 mm and a continuous energy output rate of 5.00 W. The beam is focused onto a diffuse surface by a lens whose focal length fis 3.50 cm. A diffraction pattern such as that of Fig. 36-10 is formed, the radius of the central disk being given by 1.22 fA R = (see Eq. 36-12 and Fig. 36-14). The central disk can be shown to con- tain 84% of the incident power. (a) What is the radius of the central disk? (b) What is the average intensity (power per unit area) in the incident beam? (c) What is the average intensity in the central disk?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

*60 The beam from an argon laser (of wavelength 515 nm) has a di-
ameter d of 3.00 mm and a continuous energy output rate of 5.00 W.
The beam is focused onto a diffuse surface by a lens whose focal length
fis 3.50 cm. A diffraction pattern such as that of Fig. 36-10 is formed,
the radius of the central disk being given by
1.22 fA
R =
(see Eq. 36-12 and Fig. 36-14). The central disk can be shown to con-
tain 84% of the incident power. (a) What is the radius of the central
disk? (b) What is the average intensity (power per unit area) in the
incident beam? (c) What is the average intensity in the central disk?

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