The following 20 Multiple Choice Questions (MCQ) are based on
Chapter 10: Light: Mirrors and Lenses from the NCERT Class 8
Science textbook Curiosity. Each question has four options - select the
best answer and click to check.
Instructions: Read each question carefully. Choose the most
appropriate option from (a), (b), (c), or (d). Click
Show Answer to reveal the correct answer with explanation.
Multiple Choice Questions
1A spherical mirror is part of a:
(a) Hollow sphere
(b) Flat sheet only
(c) Cylinder only
(d) Triangular prism
(a) is correct
Its reflecting surface is curved like a portion of a sphere.
2A mirror whose reflecting surface curves inward is:
(a) Convex
(b) Plane
(c) Cylindrical only
(d) Concave
(d) is correct
The reflecting side of a concave mirror resembles the inner surface of a spoon.
3A mirror whose reflecting surface bulges outward is:
(a) Plane
(b) Transparent
(c) Convex
(d) Concave
(c) is correct
A convex mirror reflects from its outward-curved surface.
4The midpoint of a spherical mirror is called the:
(a) Aperture only
(b) Pole
(c) Focus
(d) Centre of curvature
(b) is correct
The pole is the geometric centre of the reflecting surface.
5The principal axis passes through the pole and the:
(a) Centre of curvature
(b) Object only
(c) Edge of mirror only
(d) Any random point
(a) is correct
It is the straight reference line normal to the mirror at the pole.
6Parallel rays incident on a concave mirror meet at the:
(a) Pole only
(b) Centre of the object
(c) Aperture edge
(d) Principal focus
(d) is correct
A concave mirror converges paraxial rays to a real focus.
7Parallel rays reflected by a convex mirror appear to diverge from its:
(a) Real focus in front
(b) Object
(c) Principal focus behind the mirror
(d) Pole in front
(c) is correct
The backward extensions of reflected rays meet at a virtual focus.
8A convex mirror always forms an image that is:
(a) Same size in every position
(b) Virtual, erect and diminished
(c) Real and enlarged
(d) Real and inverted
(b) is correct
Its diverging reflection gives a wide field of view with smaller upright images.
9Vehicle side-view mirrors are convex mainly because they:
(a) Provide a wider field of view
(b) Always magnify traffic
(c) Form images on a screen
(d) Have no focus
(a) is correct
A convex mirror lets the driver see a larger region behind the vehicle.
10The warning 'objects in mirror are closer than they appear' is needed because a convex mirror:
(a) Forms no image
(b) Always inverts images
(c) Changes object distance physically
(d) Forms diminished images
(d) is correct
Smaller images may make vehicles seem farther away than they really are.
11A concave mirror held close to the face can form an image that is:
(a) Always real
(b) Never visible
(c) Virtual, erect and enlarged
(d) Always diminished
(c) is correct
When the object is within the focal length, reflected rays appear to come from an enlarged upright image.
12A real image can be:
(a) Always erect
(b) Obtained on a screen
(c) Seen only behind a mirror
(d) Formed only by plane mirrors
(b) is correct
Real rays actually meet at the image position and can illuminate a screen.
13A virtual image:
(a) Cannot be obtained on a screen
(b) Always forms by actual ray convergence
(c) Is always inverted
(d) Has no apparent position
(a) is correct
The rays only appear to meet when traced backward.
14The angle of incidence is measured between the incident ray and the:
(a) Mirror surface
(b) Reflected ray
(c) Principal axis only
(d) Normal
(d) is correct
Angles of incidence and reflection are defined with respect to the normal at the point of incidence.
15According to the law of reflection, angle of incidence is:
(a) Always zero
(b) Measured from the mirror
(c) Equal to angle of reflection
(d) Twice the angle of reflection
(c) is correct
For every reflected ray, i = r.
16The incident ray, normal and reflected ray lie in:
(a) The mirror material only
(b) The same plane
(c) Three perpendicular planes
(d) No definite plane
(b) is correct
This coplanarity is the second law of reflection.
17A lens thicker at the centre than at the edges is generally:
(a) Convex
(b) Concave
(c) Plane mirror
(d) Opaque
(a) is correct
A convex lens converges parallel light in air.
18A lens thinner at the centre than at the edges is:
(a) Convex
(b) Plane
(c) Spherical mirror
(d) Concave
(d) is correct
A concave lens diverges incident parallel rays.
19A concave lens generally forms an image that is:
(a) Real and inverted
(b) Always same size
(c) Virtual, erect and diminished
(d) Real and enlarged
(c) is correct
A diverging lens produces a smaller upright virtual image for a real object.
20A magnifying glass uses a:
(a) Plane glass with no curvature
(b) Convex lens with the object within its focal length
(c) Concave lens only
(d) Convex mirror
(b) is correct
A nearby object viewed through a convex lens appears enlarged and upright.
