• Plane mirrors always produce virtual images, because they never focus light into a single converging point.
• Hence it does not produce real object or image
  
• As power of the plane mirror is zero, hence, it neither converges nor diverges the rays.
• Hence the option C is the right answer

In this case, the mirror is moved 25 cm away from its initial position. Therefore, if the mirror is moved with distance x, then image in the mirror will move by distance 2x.
That is, 2x=50 cm.
So, the image will shift by 50 cm away from its previous position.

In plane mirrors the image formed is of the same size.

Answer is B.

The image formed by a plane mirror is always virtual (meaning that the light rays do not actually come from the image), upright, and of the same shape and size as the object it is reflecting. A virtual image is a copy of an object formed at the location from which the light rays appear to come.
To summarize, the image formed by plane mirrors are,
1. Virtual 
2. Behind the mirror 
3. Erect (means not inverted) 
4. Same size as the object 
5. At same distance from the mirror as the object is from the mirror.

Images formed by plane mirrors are virtual, upright, left-right reversed, the same distance from the mirror as the object's distance, and the same size as the object.

An image, such as that seen in a mirror, in which the rays of light appear to be emanating from some object that is not there is called a virtual image. Virtual images are always erect. They, also, may be either larger or smaller than the object.
Hence, the statement is true.

Angle of incidence and the angle of reflection measured from the normal drawn on the point of incidence.

Answer is D.

For a spherically curved mirror in air, the magnitude of the focal length is equal to the radius of curvature of the mirror divided by two. The focal length is positive for a concave mirror.
Therefore, the focal length of the mirror is 20 cm / 2 = 10 cm.
The mirror equation expresses the quantitative relationship between the object distance (do), the image distance (di), and the focal length (f). The equation is stated as follows:
1/f = 1/do + 1/di
So, 1/di = 1/f - 1/do = 1/10 - 1/15
Therefore, di = 30 cm.
The magnification equation relates the ratio of the image distance and object distance to the ratio of the image height (hi) and object height (ho). The magnification equation is stated as follows:
M = hi / ho = -(di / do) = -(30 / 15) = -2.
Hence, the image magnification produced is -2.

The nature of the image formed by a plane mirror is virtual, erect, of the same size and also laterally inverted

Lateral inversion is the side ways reversal of the image's left and right when compared that of object.Lateral inversion is observed in images formed by plane mirror 

Magnification of a plane mirror is unity irrespective of distance of object from the mirror.

It should be remembered that `plane mirror always form virtual, errect and laterally inverted image.

The image formed by a plane mirror is virtual and erect

Image formed by a plane mirror is always virtual, errect, laterally inverted (sideways inverted) with unit magnification.

The image formed by a plane mirror is erect and virtual in nature and of same size as that of the object. The distance of image from the mirror, behind the mirror, is same as the distance of the object from the mirror, in front of the mirror.

A single plane mirror can form only a single image for a single object.

$ \bf{Plane\ Mirrors} $ always produce a virtual and erect image having the same size as that of the object irrespective of the position of object.

$ \bf{Plane\ Mirrors} $ always produce a $ \bf{virtual} $ and $ \bf{erect} $ image having the $ \bf{same\ size\ as\ that\ of\ the\ object} $ irrespective of the position of object on the principal axis.

Hence, the correct answer is OPTION A.

Real image is formed at a point where light rays actually meet where virtual image is formed at a point where rays of light appears to meet.

Images in a plane mirror are formed as far behind the mirror as the object in front of it. 
Thus, the distance of the image of an object from the mirror is equal to the distance of the object from the mirror. 

Hence, the correct answer is OPTION B.

It is obvious that if the object is shifted by a distance $d$ towards the mirror, the image will also shift the same distance $d$ towards the mirror i.e., the separation between the object and the image will decrease by $2d$.

A plane mirror is made from a few mm thick glass plate. One surface of glass plate is polished to a high degree of smoothness. This forms the front part of the mirror. And the other (back) surface is silvered (i.e painted with silver, mercury or some other material).

There are two kinds of reflection

I) Regular reflection

ii) Irregular reflection.

For plane mirror, the distance between object and mirror $=$ distance between image and mirror $=100$ (given)

The image formed will be an erect image of same height as that of the person (object) but laterally reversed  i.e his right hand will appear to be his left hand of his mirror image and vice-verse.

The image formed by concave mirror can be real or virtual and inverted as well.
The image formed by the convex mirror will be virtual, erect but smaller in  size than the object.
The image formed by convex lens can be inverted.
Plane mirrors are the only mirrors for which the image will always be virtual, erect and of the same size as the object. The image produced is also laterally inverted.

Since image formed by a plane mirror is at a same distance as that of object distance increases then image distance will also increase.

Plane mirror and convex mirror will always form virtual and erect images for all position. Convex mirror forms diminished image.

Object is defined as point of intersection of incident rays. Image is defined as point of intersection of reflected rays (in case of reflection) or refracted rays( in case of refraction).

Optical image, the apparent reproduction of an object, formed by a lens or mirror system from reflected, refracted, or diffracted light waves.

1) A real image is always inverted whereas a virtual image is always erect. 

A plane mirror can produce a real image if and only if the incident rays are convergent in nature.

Virtual image cannot be caught on a screen.

Initial object distance $= 2m$
Final object distance
$=2 m-1 m+0.5 m$
$=2.5 m$
The distance between the images of the man is 0.5 m.

In a plane mirror, each point on the image is as far behind the mirror plane as the corresponding point on the object is in front.  So, the image of an object is reversed in the direction perpendicular to the surface of the mirror. Therefore, the concept is called as Lateral inversion. It is the apparent reversal of left and right that we often see in a plane mirror image. Due to this lateral inversion, it is difficult to read the image of a text page formed due to reflection by a plane mirror.

For plane mirrors, the object distance (do) is equal to the image distance (di). That is, the image is the same distance behind the mirror as the object is in front of the mirror. If we stand a distance of 2 meters from a plane mirror, we must focus at a location 2 meters behind the mirror in order to view our image.
In this case, an insect is sitting in front of a plane mirror at a distance $1$$m$ from it.
Case (a):
As the object distance and image distance are equal, the image is formed at a distance of 1 m behind the mirror.
Case (b):
The image distance is 1 m and the object distance is 1 m. Hence, the total distance between the insect and its image is 2 m.

The image formed by a plane mirror is always virtual (meaning that the light rays do not actually come from the image), upright, and of the same shape and size as the object it is reflecting. A virtual image is a copy of an object formed at the location from which the light rays appear to come.
Hence, the statement is true.

As the image formed by a plane mirror is always virtual,upright, and of the same shape and size as the object it is reflecting.
Hence, option B is incorrect statement.

Number of images will be given by,

It should be remembered that plane mirror always form virtual and errect image and that too of same but laterally inverted.

A plane mirror always forms erect image and of same size as well.

For reflection from a plane mirror, distance between object and mirror $=$ distance between mirror and the image$=0.25m$

The size of the object in accordance with the Fresnel's displacement law is given by $\sqrt{x _1x _2}$.

A mirror that forms a virtual image of a real object is :
(a) Concave mirror: When object is placed only between pole and focus of the mirror.
(b) Convex mirror: For all positions of objects, image is virtual.
(c) Plane mirror: Image formed is virtual.

Amount of light reflected depends upon nature of material of the object, nature of the surface and smoothness of the surface. If the material is opaque for an incident light, then the total amount of incident light gets reflected. Otherwise, a part of the incident light can get transmitted.  If the surface is smooth, the reflection is more, otherwise reflected light can get scattered. 

The image that is formed by a plane mirror will be virtual, upright, same size and inverted

The object distance and the image distance will be equal.

Thus, the image formed by a plane mirror is virtual and inverted.

Image formed by a plane mirror is of same size as that of object and is formed at the same distance behind the mirror as object is in front of the mirror.