Polaroid sheets are often used for making sun glasses. This is because polaroid glass.A. (a) cut off glareB. (b) absorb more light than coloured glassesC. (c) are light-weightD. (d) remove the polarisation of direct sunlight

Polaroid sheets are often used for making sun glasses. This is because

1.	Polaroid sheets are often used for making sun glasses. This is because polaroid glass.A. (a) cut off glareB. (b) absorb more light than coloured glassesC. (c) are light-weightD. (d) remove the polarisation of direct sunlight
Answer» Correct Answer - A `tantheta=(mu_2)/(mu_1)=(1)/(sin C_2)xx(sin C_1)/(1)=(sin C_1)/(sin C_2)`

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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`
Find the half angular width of the central bright maximum in the fraunhofer diffraction pattern of a slit of width `12xx10^(-5)cm` when the slit is illuminated by monochromatic light of wavelength 6000 Å.
Find the half angular width of the central bright maximum in the fraunhofer diffraction pattern of a slit of width `12xx10^(-5)cm` when the slit is illuminated by monochromatic light of wavelength 6000 Å.A. `40^(@)`B. `45^(@)`C. `30^(@)`D. `60^(@)`
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Polaroid sheets are often used for making sun glasses. This is because polaroid glass.A. (a) cut off glareB. (b) absorb more light than coloured glassesC. (c) are light-weightD. (d) remove the polarisation of direct sunlight

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