give scientific reasons.
1. The coating of lead oxide is given over a plane mirror
Answers
Answered by
1
Answer:
A smooth, highly polished reflecting surface is called a mirror. One surface of the mirror is made opaque by silvering it following by a thin coat of red lead oxide paint.
Answered by
3
A mirror is a mirror because of silver coating. Silver reflects light very efficiently to form a virtual image of the same size of the object when the glass is plane.
All mirrors whether plane or not, are coated with silver, and back with lead oxide.
Unknowingly you have given the answer yourself. “ To protect.” Silver layer is very thin and hence very vulnerable to damage, scratch and atmospheric corrosion etc. A thin layer of sliver gets tarnished due to atmospheric oxygen and sulpher dioxide very quickly. Lead oxide is easy to coat uniformly, cheap, strong enough to wear and tear, and resistant to atmospheric effects.
Last but not the least, it does not react with metallic silver, so the the silver layer, if the mirror is kept well, lasts for a very long period, even centuries.
MY DEAR FRIEND PLEASE THANKS MY 15 ANSWERS. ☺☺
Similar questions