Q. two beams A and B of plane polarised light with mutually perpendicular planes of polarization are seen through a polaroid from the position when the beam a has maximum intensity of rotation of polaroid through 30 degree makes the two beams appear equally bright if the initial intensity is of the two beams are Ia and Ib respectively then find out its ratio.
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.•♫•ecchi •♫•.
using malus law
Ia cos^2 30° = Ib cos^2 60°
3Ia/4 = Ib/4
Ia/Ib = 1/3
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[TEX] HELLO[/tex]
Answer:
"rotation of polaroid through 30 degree"
IA cos2 30 = IB cos2 60
IA/IB = 1/3
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