Plane polarized light is passed through a polaroid. On viewing through the polaroid, we find that when the polaroid is given one complete rotation about the direction of the light, one of the following is observed :
Correct answer: A. The intensity of light gradually decreases to zero and remains at zero
- A. The intensity of light gradually decreases to zero and remains at zero
- B. The intensity of light gradually increases to a maximum and remains at maximum
- C. There is no change in intensity
- D. The intensity of light is twice maximum and twice zero
Explanation
When plane polarized light passes through a polaroid, and the polaroid is rotated, the intensity of light gradually decreases to zero and remains at zero as the polaroid is rotated one complete rotation about direction of the light.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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