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COMEDK2013PhysicsWave Optics

H- polaroid is prepared by

Options

  1. Aorienting herapathite crystal in the same direction in nitrocellulose
  2. Busing thin tourmaline crystals
  3. Cstretching polyvinyl alcohol and then heated with dehydrating agent
  4. Dstretching polyvinyl alcohol and then impregnating with iodine

Correct answer

D. stretching polyvinyl alcohol and then impregnating with iodine

Step-by-step solution

H -polaroid is prepared by stretching a thin sheet of polyvinyl alcohol and then impregnating with iodine. In this process, the molecules are oriented in the direction of applied strain.

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