Reflection from Plane Mirrors
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.
Uses of Plane Mirror:
The various uses of plane mirror:
Formation of Image:
When an object is placed in front of a plane mirror, its image is formed in the plane mirror. We can find the location of the image of an object in a plane mirror by using the laws of reflection of light.
In the figure below the object is placed in front of a plane mirror. An image of the object will be formed in the plane mirror. We can locate the position of image of this object in the plane mirror by drawing a ray diagram.
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 | |||
| View Explanation | |||
Pericscope works on the principal of _____ of light. | |||
| Right Option : A | |||
| View Explanation | |||
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 | |||
| View Explanation | |||
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