If the image formed is always virtual, the mirror can be
concave or convex
concave or plane
convex or plane
only convex
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
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 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
Which of the following always diverge light rays?
convex mirror and plane mirror
concave mirror and convex mirror
concave lens and concave mirror
concave lens and convex mirror
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
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
A virtual image larger than the object can be produced by a
concave lens
concave mirror
convex mirror
plane mirror
Which of the following would you prefer to use while reading small letters found in a dictionary?
a concave mirror
a concave lens
a convex mirror
a convex lens
A convex lens has a focal length of 10cm. At which of the following distance should an object be placed in front of this convex lens so that it may act as a magnifying glass?
15cm
7cm
20cm
25 cm
