A beam of initially unpolarized light of intensity 610 W/m^2 passes through a series of polarizing filters, each one s axis aligned at a 12.9-degree angle with respect to the previous filter s axis. The beam of light emerging from the final filter in the series has an intensity of 213.2 W/m^2. How many polarizing filters did the beam pass through? 12 8 4 16

A beam of initially unpolarized light of intensity 610 W/m^2 passes through a series of polarizing filters, each one s axis aligned at a 12.9-degree angle with respect to the previous filter s axis. The beam of light emerging from the final filter in the series has an intensity of 213.2 W/m^2. How many polarizing filters did the beam pass through? 12 8 4 16

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter34: Maxwell’s Equations And Electromagnetic Waves

Section: Chapter Questions

Problem 63PQ

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In Figure P37.52, suppose the transmission axes of the left and right polarizing disks are perpendicular to each other. Also, let the center disk be rotated on the common axis with an angular speed . Show that if unpolarized light is incident on the left disk with an intensity Imax, the intensity of the beam emerging from the right disk is I=116Imax(1cos4t) This result means that the intensity of the emerging beam is modulated at a rate four times the rate of rotation of the center disk. Suggestion: Use the trigonometric identities cos2=12(1+cos2) and sin2=12(1cos2). Figure P37.52
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