For which type of mirror will the image always be erect,regardless of the distance at which the object is placed?

Why does a light ray incident on a rectangular glass slab immersed in any medium emerge parallel to itself? Explain.

Which of the following conditions must be satisfied to obtain a magnified image of an object using a concave mirror?

The figure below shows the refraction and emergence of a ray of light incident on a rectangular glass slab. Copy the diagram and mark the lateral displacement of the incident ray. Name the two factors on which the lateral displacement depends.

$(a)$ Why does a ray of light passing through the centre of curvature of a concave mirror after reflection get reflected back along the same path?
$(b)$ Why are convex mirrors commonly used as rear-view mirrors in vehicles?
$(c)$ $A$ pencil partly immersed in water in a glass tumbler appears to be displaced at the interface of air and water. Name the phenomenon of light responsible for it.

Name the type of mirror used in the following:
$(a)$ Solar furnace.
$(b)$ Side/rear-view mirror of a vehicle.
Draw a labelled ray diagram to show the formation of image in each of the above two cases.
Which of these mirrors could also form a magnified and virtual image of an object? Illustrate with the help of a ray diagram.