The image formed by a plane mirror is always:

A concave mirror is also called a:

Which type of lens is thicker at the center than at the edges?

Which lens is used to correct short-sightedness (myopia)?

The focal length of a concave mirror is:

Which type of mirror is used in solar cookers?

The image formed on the retina of the human eye is:

Which type of lens is used in a magnifying glass?

The mirror used in a flashlight is:

Which lens is used in eyeglasses for farsightedness (hypermetropia)?