Reflection from Plane Mirrors


 
 
Concept Explanation
 

Reflection from Plane Mirrors

Plane Mirrors

Plane mirrors are commonly used as looking glasses. We use them while dressing, Combing, and so on. A plane mirror is made from a glass plate, a few millimetres thick. One surface of the glass is polished to a high degree of smoothness, forming the front surface of the mirror. The back surface is silvered, i.e., coated with a thin layer of silver, aluminium or some other shiny, opaque material. A coat of opaque paint behind this layer protects the silvering. When light from an object falls on the front surface, most of it enters the glass plate and falls on the silvered surface.

Reflection From Plane Mirrors:

An image by a plane mirror is formed when light from the object reaches our eyes after reflection from the plane mirror. As the light enters our eyes we can see all the details of the object. Plane mirror is the surface with flat reflecting surface.

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Sample Questions
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Question : 1

Which of the following are correct :

(a) Plane mirror are used as looking mirrors in our homes.

(b) The plane mirrors are used in kaleidoscope, periscope and solar cookers.

Right Option : C
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Question : 2

__________________  are commonly used as looking glasses. We use them while dressing, Combing, and so on.

Right Option : A
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Explanation
Question : 3

Which of the following are correct :

(a) Plane mirror are used as looking mirrors in our homes.

(b) A plane mirror is made from a glass plate, a few millimetres thick.

(c) One surface of the glass is polished to a high degree of smoothness, forming the front surface of the mirror.

(d) The back surface of mirror is silvered, i.e., coated with a thin layer of silver, aluminium or some other shiny, opaque material.

Right Option : D
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Explanation
 
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