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      Question

      In mirrors the back surface is coated with a thin layer

      of
      A Mercury Correct Answer Incorrect Answer
      B Silver Correct Answer Incorrect Answer
      C Red oxide Correct Answer Incorrect Answer
      D Silver nitrate Correct Answer Incorrect Answer

      Solution

      In a spherical mirror, one of the twocurvedsurfacesiscoatedwithathinlayerof silver followed by a coating of red lead oxide paint. Thus, one side of the spherical minor is opaque and the other side is a highly polished reflecting surface.

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