Page 1 - HA-sign convention rules of spherical mirror

Objective Questions:

For a real object, which of the following can produce a real image?
(a) Plane mirror
(b) Concave mirror
(c) Concave lens
(d) Convex mirror

Which of the following mirror is used by a dentist to examine a small
cavity?
(a) Convex mirror
(b) Plane mirror
(c) Concave mirror
(d) Combination of convex and concave mirror

An object at a distance of 30 cm from a
concave mirror gets its image at the same point. The focal length of the
mirror is
(a) – 30 cm
(b) 30 cm
(c) – 15 cm
(d) +15 cm

An object at a distance of + 15 cm is slowly moved towards the pole of a
convex mirror. The image will get
(a) shortened and real
(b) enlarged and real
(c) enlarge and virtual
(d) diminished and virtual

A concave mirror of radius 30 cm is placed in water. It’s focal length in air
and water differ by
(a) 15
(b) 20
(c) 30
(d) 0

The nature of the image formed by concave mirror when the object is
placed between the focus (F) and centre of curvature (C) of the mirror
observed by us is
(a) real, inverted and diminished
(b) virtual, erect and smaller in size