Question

A He-Ne laser produces light of 633 nm wavelength, 1.5 mW power, with a cylindrical beam of 0.64 mm in diameter. (a) What is the intensity of this laser beam? (b) The damage threshold of the retina is 100 W/m2 . Is this laser safe to view head-on? (c) What are the maximum values of the electric and magnetic fields? (d) What is the average energy density in the laser beam?

Name: a he ne laser produces light of 633 nm wavelength 15 mw power with a cylindrical beam of 064 mm in diameter a what is the intensity of this laser beam b the damage threshold of the retina is 92843
Uploaded: 2022-06-29T03:55:12-08:00
Duration: 3 min 20 s
Channel: Madhur L
Description: a he ne laser produces light of 633 nm wavelength 15 mw power with a cylindrical beam of 064 mm in diameter a what is the intensity of this laser beam b the damage threshold of the retina is 92843

          A He-Ne laser produces light of 633 nm wavelength, 1.5 mW power, with a cylindrical beam of 0.64 mm in diameter. 
(a) What is the intensity of this laser beam? 
(b) The damage threshold of the retina is 100 W/m2 . Is this laser safe to view head-on? 
(c) What are the maximum values of the electric and magnetic fields? 
(d) What is the average energy density in the laser beam?

Added by Julia M.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Madhur L

06/29/2022

Step 1

5 \, \text{mW}\) and \(r = 0.32 \, \text{mm} = 0.32 \times 10^{-3} \, \text{m}\). Show more…

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A He-Ne laser produces light of 633 nm wavelength, 1.5 mW power, with a cylindrical beam of 0.64 mm in diameter. (a) What is the intensity of this laser beam? (b) The damage threshold of the retina is 100 W/m2 . Is this laser safe to view head-on? (c) What are the maximum values of the electric and magnetic fields? (d) What is the average energy density in the laser beam?