A teacher does a demonstration using an overhead projector (I = 1810 lm; units are lumens) and three polarizing discs. She places the first disc directly on the overhead machine, a second disc with its axis of polarization completely aligned with the first, and the third with its axis of polarization of 54 degrees counterclockwise to the second. Calculate the intensity of the light that emerges from the third disc. Table 5 Physical ConstantsQuantitySymbolApproximate valuespeed of light in a vacuum3.0 x 10° m/sgravitational constantG6.67 x 10-1"N-m²/kg²Coulomb's constantk8.99 x 10°N-m?/C2charge on electron-e1.60 × 10-19Ccharge on protone1.60 x 10-19Celectron massme9.11 x 10-31 kgproton massm,1.673 x 10-27 kgneutron mass1.675 x 10-27 kgatomic mass unit1.660 x 10-27 kguPlanck's constanth6.63 x 10- J-selectron-voltev1.60 x 10-19 J

Intensity of incident light (I) = 1810 lumens

Answered: A teacher does a demonstration using an…

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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A teacher does a demonstration using an overhead projector (I = 1810 lm; units are lumens) and three polarizing discs. She places the first disc directly on the overhead machine, a second disc with its axis of polarization completely aligned with the first, and the third with its axis of polarization of 54 degrees counterclockwise to the second. Calculate the intensity of the light that emerges from the third disc.

Table 5 Physical Constants
Quantity
Symbol
Approximate value
speed of light in a vacuum
3.0 x 10° m/s
gravitational constant
G
6.67 x 10-1"N-m²/kg²
Coulomb's constant
k
8.99 x 10°N-m?/C2
charge on electron
-e
1.60 × 10-19C
charge on proton
e
1.60 x 10-19C
electron mass
me
9.11 x 10-31 kg
proton mass
m,
1.673 x 10-27 kg
neutron mass
1.675 x 10-27 kg
atomic mass unit
1.660 x 10-27 kg
u
Planck's constant
h
6.63 x 10- J-s
electron-volt
ev
1.60 x 10-19 J

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