Which of the following statements is true about the image formed by a plane mirror?

The figure shows a ray of light as it travels from medium $A$ to medium $B$. The refractive index of medium $B$ relative to medium $A$ is:

State the sign convention for lenses regarding object and image distances.

When a concave mirror produces a virtual and magnified image of an object,what is the object distance?

What is the minimum number of rays required for locating the image formed by a concave mirror for an object? Draw a ray diagram to show the formation of a virtual image by a concave mirror.

What kind of image is formed when an object is placed between the principal focus $(F)$ and the optical center $(O)$ of a convex lens?