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प्रश्न
The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at 22.5° from the polarization axis of one of the polaroids, is (I0 is the intensity or polarised light after passing through the first polaroid):
पर्याय
`(I_0)/2`
`(I_0)/4`
`(I_0)/8`
`(I_0)/16`
MCQ
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उत्तर
`(I_0)/8`
Explanation:
(I0 cos2θ) cos2(90° − θ)
= `(I_0)/4 sin^2 (2θ)`
= `(I_0)/4 sin^2 (2 xx 22.5°)`
= `(I_0)/4 sin^2 (45°)`
= `(I_0)/8`
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