A polariser and an analyser are oriented so that the maximum amount of lights is transmmitted. Fraction of its maximum value is the intensity of the transmitted through reduced when the analyzer is rotated through (intensity of incident light `= I_(o)`) , a) `30^(@)` , b) `45^(@)` , c) `60^(@)`A. `0.375 I_(0), 0.25I_(0), 0.125 I_(0)`B. `0.25 I_(0), 0.375 I_(0), 0.125 I_(0)`C. `0.125 I_(0), 0.25 I_(0), 0.0375 I_(0)`D. `0.125 I_(0), 0.375 I_(0) , 0.25 I_(0)`

A polariser and an analyser are oriented so that the maximum amount of

1.	A polariser and an analyser are oriented so that the maximum amount of lights is transmmitted. Fraction of its maximum value is the intensity of the transmitted through reduced when the analyzer is rotated through (intensity of incident light `= I_(o)`) , a) `30^(@)` , b) `45^(@)` , c) `60^(@)`A. `0.375 I_(0), 0.25I_(0), 0.125 I_(0)`B. `0.25 I_(0), 0.375 I_(0), 0.125 I_(0)`C. `0.125 I_(0), 0.25 I_(0), 0.0375 I_(0)`D. `0.125 I_(0), 0.375 I_(0) , 0.25 I_(0)`
Answer» Correct Answer - A `I = (I_(0))/(2) cos^(2) theta`

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Angular width of central maxima in the Fraunhofer diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength `6000Å`. When the slit is illuminated by light of another wavelength, the angular width decreases by 30%. The wavelength of this light will beA. `3500 Å`B. `4200 Å`C. `4700 Å`D. `6000 Å`
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