The letter F is placed in front of a plane mirror
How would its image look like when seen in the mirror ?
What is the name of phenomenon involved ?

A point source of light is placed in front of a plane mirror.

An object is placed in front of a concave mirror between the pole and the focus of the mirror. What is the nature of the image formed by the mirror ?

A flat glass slab of thickness 6 cm and index 1.5 is placed in front of a plane mirror. An observer is standing behind the glass slab and looking at the mirror. The actual distance of the observer from the mirror is 50 cm. The distance of his image from himself, as seen by the observer is

A thin convex lens of focal length 30 cm is placed in front of a plane mirror. An object is placed at a distance x from the lens (not in between lens and mirror ) so that its final image coincides with itself. Then, the value of x is