Question

3. Is the shadow or the image of an object, in a plane
mirror, always of the size of the object? ​

Answer 1

Image formed in a mirror:

An image in a plane mirror is created by the light rays reflecting off the reflective surface of a mirror. The image is always virtual because the light rays remain parallel, meaning they never pass through a focal point. The image is actual size, laterally inverted, and always virtual.