McqMate
| Q. |
In mirrors the back surface is coated with a thin layer of |
| A. | Mercury |
| B. | Silver |
| C. | Red oxide |
| D. | Silver nitrate |
| Answer» B. Silver | |
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Explanation: In a spherical mirror, one of the two curved surfaces is coated with a thin layer of 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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