When will the convex lens give a real image?
a) Beyond optical center
b) Beyond focus
c) Beyond center of curvature
d) Between focus and curvature
Name the lens used in a simple microscope.
a) Biconvex
b) Biconcave
c) Plano-convex
d) Cylindrical
If the magnification is positive and greater than unity,
what does it indicate?
a) Virtual image
b) Real image
c) Distorted image
d) Erect image
Which of the following form an upright virtual image that is smaller in size?
NTS PST 15/12/2019 (2:30).
a) plan mirror
b) convex mirror
c) concave mirror
d) a tinted glass
What type of image is produced by a concave lens?
a) Always virtual and enlarged
b) Always real
c) Always virtual and reduced in size
d) Sometimes real and sometimes virtual
In X-ray emission tubes, X-ray is emitted by the acceleration of …………
a) Atoms
b) Protons
c) Electrons
d) Neutrons
