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Polarods are used to control the intensi...

Polarods are used to control the intensity of light coming through windows of

A

trans and aeroplanes

B

four wheelers

C

rooms

D

theatres

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A
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Two polaroids are kept initially with their axes parallel to each other. One of the palaroid is then rotated through various angles. How would the intensity of light coming from the rotating polaroid be affected, compared to initial intensity if it is ratated through (i) 45^@ (ii) 90^@ (iii) 180^@ .

A polarizer-analyser set is adjusted such that the intensity of light coming out of the analyser is just 12.5 % of the original intensity of light incident on the polarizer. Assuming that the polarizer-analyser set does not absorb any light, the angle by which the analyser need to be rotated in any sense to increase the output intensity to double of the previous intensity, is :

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TARGET PUBLICATION-WAVE THEORY OF LIGHT -EVALUATION TEST
  1. Polarods are used to control the intensity of light coming through w...

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  2. lamdaa and lamdam are the wavelengths of light in air and medium resp...

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  3. A clear sheet of polaroid is placed on top of a similar sheet so that...

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  4. Unpolarised light of internsity 32 Wm^(-2) passes through three polari...

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  5. With what speed should a glaxy move with respect to us so that a certa...

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  6. A beam of unpolarised light having flux 10^(-2) watt falls normally on...

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  7. Assertion : If light is polarised by reflection, then the angle betwee...

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  8. The speactral line emitted by a star, has a wavelength of 6800 Å when ...

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  9. A cylindrical wavefront spreads form a line source which is comparable...

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  10. A lens of focal length f gives diffraction pattern of Fraunhoffer type...

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  11. A parallel beam of monochromatic light is incident on a glass slab at ...

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  12. For passage of monochromatic beam of light in a medium of refractive i...

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  13. Velocity of light in deamond is (2/5)^(th) that in air. Velocity of l...

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  14. For navigatio purpose, in polar regions

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  15. When a plane wavefront is incident on a double convex lens, the refrac...

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  16. As a spherical wavefront propagates, the amplitude (a) of a spherical ...

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  17. Assertion: Speed of light in glass is indep[endent of the colour of l...

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  18. Assertion : Stars are often photographed with the help of telescope fi...

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  19. Assertion : If theta is the angle between the planes of transmission ...

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  20. Ordinary light incident on a glass slab at the polarising angle suffer...

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  21. A mixture of plane polarised and unpolarised light falls normally on a...

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