Which property of light makes a pencil cast a shadow when it is held in front of a light source?

Name the phenomenon responsible for the following effect:

When we sit in front of a plane mirror and write with our right hand, it appears in the mirror that we are writing with the left hand.

If an object is placed at a distance of 10 cm in from of a plane mirror, how far would it be from it’s from?

The image seen in a plane mirror cannot be formed on a screen. What name is given to this type of image?

Fill in the following blanks with a suitable word:

When light is reflected, the angles of reflections and incidence are _______