The outer surface of a flat steel plate acts as a ___________ mirror.

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Solution

Plane Mirror:
A mirror with a flat reflecting surface is known as a plane mirror.
In a plane mirror, the angle of incidence is equal to the angle of reflection. The angle of incidence is the angle between the incident ray and normal (a line perpendicular to the mirror surface) and the angle of reflection is the angle between the reflected ray and normal.
The image formed by them does not depend on the distance between the object and the mirror.
The image formed by a plane mirror is virtual (not real), erect (right-side up), and the same size as the object.
Flat steel plate:
The outer surface of the flat steel plate acts like a plane mirror.
The image formed by a flat steel plate, similar to a plane mirror, is virtual, erect, and the same size as the object.
Hence, the outer surface of a flat steel plate acts as a plane mirror.

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