Plane mirror is not used as rear view mirror for vehicles. Why?
Answers
A plane mirror does not form diminished image.
Explanation:
The rear view mirror formed from a convex mirror/converging mirror. A plane mirror cannot be used because it does not converges light. In order to see traffic at the back, the convex mirror is used because it converges the light. It forms a virtual, erect and diminished image.
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A plane mirror is not used as rear view mirror because it has a less wider field of view and it forms images of the same size of the object.
- A rear view mirror is used to see the traffic at the back side of the vehicle to give a good idea of position to the driver.
- For this purpose a mirror with wider field of view must be used so that it covers a larger area.
- A plane mirror has a less wider field of view and it forms images of the same size. So it cannot be used.