# Two polaroids are placed in the path of unpolarized beam of intensity  such that no light is emitted from the second polaroid.  If a third Polaroid whose polarization axis makes an angle  with the polarization axis of first Polaroid, is placed between these polaroids, then the intensity of light emerging from the last Polaroid will be a) b) c) d)

## Question ID - 150140 :- Two polaroids are placed in the path of unpolarized beam of intensity  such that no light is emitted from the second polaroid.  If a third Polaroid whose polarization axis makes an angle  with the polarization axis of first Polaroid, is placed between these polaroids, then the intensity of light emerging from the last Polaroid will be a) b) c) d)

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(a)

Let initial intensity of light is   So intensity of light after transmission from first Polaroid

Intensity of light emitted from

Intensity of light transmitted from last Polaroid

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 In two separate set-ups of the Young’s double slit experiment, fringes of equal width are observed when lights of wavelengths in the ratio 1:2 are used. If the ratio of the slit separation in the two cases is 2 : 1, the ratio of the distances between the plane of the slits and the screen in the two set-ups is a) 4 : 1 b) 1 : 1 c) 1 : 4 d) 2 : 1