Which of the following can form a virtual image which is always smaller than the object?
a. Concave mirror b. Concave lens c. Convex mirror d. Convex lens
A and B
B and C
A and C
B and D
Whatever be the position of the object, the image formed by a mirror is virtual, erect and smaller than the object. The mirror then must be
convex
concave
plane
either concave or convex
The image of an object formed by a plane mirror is
virtual
real
diminished
upside- down
In a convex spherical mirror, reflection of light takes place at
a flat surface
a bent in surface
a bulging out surface
an uneven surface
The image formed by a concave mirror is seen to be virtual, erect and larger than the object. The position of object must then be
between focal length and twice the focal length
far off (many times the focal length)
close to concave mirror (at less than focal length)
greater than twice the focal length
The splitting up of white light into seven colours on passing through a glass prism is called
refraction
deflection
dispersion
scattering
The image formed by a spherical mirror is virtual. The mirror will be
metallic
The mirror which can form a magnified image of an object is
convex mirror
plane mirror
concave mirror
both convex and concave mirrors
A concave mirror cannot be used as
a magnifying mirror
a torch reflector
a dentist's mirror
a rear view mirror
The image formed by a plane mirror is
virtual, behind the mirror and enlarged
virtual, behind the mirror and of the same size as the object
real, at the surface of the mirror and enlarged
real, behind the mirror and of the same size as the object
