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In mirrors the back surface is coated with a thin layer...

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In mirrors the back surface is coated with a thin layer of :

Answer & Solution
Correct Answer: Option B
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 mirror is opaque and the other side is a highly polished reflecting surface.
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