Question

if an object us.placed 12cm from the plane mirror what will be the position of image?​

Answer 1

The position of the image will be 12 cm behind the plane mirror.

Given,

An object is placed at 12 cm from a plane mirror.

To find,

Position of the image formed.

Solution,

If an object is placed in front of a plane mirror, the image thus formed will have the following properties.

• The image formed will be virtual and erect.
• It is of the same size as that of the object.
• The distance of the image from the plane mirror is the same or equal to the distance between the object and the mirror.

Here, it is given that the object is 12 cm from the plane mirror.

From the above properties, we can see that the distance of the image from the plane mirror will also be equal to 12 cm.

As the image is virtual, it will be behind the mirror, and, it can also be said that the distance between the object and the image will be 24 cm.

Therefore, the position of the image will be 12 cm behind the plane mirror.

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Answer 2

Answer:

The position of the image is also 12 cm.

Step-by-step explanation:

• A plane mirror is a mirror with a flat (planar) reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence.

• The angle of incidence is the angle between this normal and the incident ray.

• The angle of reflection is the angle between this normal and the reflected ray.

According to the law of reflection, the angle of incidence equals the angle of reflection.

Properties of an image formed by a plane mirror

• The image obtained is virtual.
• The image is laterally inverted.
• The image is erect.
• The size of the image is the same as the size of the object.
• The distance between the image obtained is the same as the distance between the object from the mirror.