Chapter 10 of Class 8 Science Light: Mirrors and Lenses is an important physics chapter. In this chapter, you are going to learn how concave and convex mirrors form different kinds of images. The chapter 10 also covers the laws of reflection. It also shows how convex and concave lenses converge or diverge light.
The MCQs and match-the-following questions below provide a fun way to revise the chapter. Let’s now start mastering the mirrors and lenses.
You might want to check out Class 8 Science MCQ Questions and Answers.
Light: Mirrors and Lenses Class 8 Science Chapter 10 MCQ Online Test Questions and Answers
Question 1. Mirrors whose reflecting surfaces are shaped like a part of a hollow sphere are called:
a) Plane mirrors
b) Spherical mirrors
c) Polished mirrors
d) Transparent mirrors
Answer:
b) Spherical mirrors
Question 2. A spherical mirror with its reflecting surface curved inwards is called a:
a) Convex mirror
b) Plane mirror
c) Concave mirror
d) Lens mirror
Answer:
c) Concave mirror
Question 3. A spherical mirror with its reflecting surface curved outwards is called a:
a) Concave mirror
b) Convex mirror
c) Plane mirror
d) Cylindrical mirror
Answer:
b) Convex mirror
Question 4. When the inner curved surface of a shiny spoon is used as a mirror and seen from a suitable distance, the image formed is usually:
a) Always erect and same-sized
b) Inverted
c) Always erect and diminished
d) Invisible
Answer:
b) Inverted
Question 5. When the outer curved surface of a shiny spoon is used as a mirror, the image formed is generally:
a) Erect and smaller
b) Inverted and larger
c) Same size and erect
d) Always invisible
Answer:
a) Erect and smaller
Question 6. Concave and convex mirrors can be identified by viewing them from the side because their reflecting surfaces are curved:
a) Sideways and upward
b) Inwards and outwards respectively
c) Downwards and straight respectively
d) In the same manner
Answer:
b) Inwards and outwards respectively
Question 7. When an object is placed close to a concave mirror, the image formed is:
a) Erect and enlarged
b) Inverted and diminished
c) Erect and diminished
d) Same size and erect always
Answer:
a) Erect and enlarged
Question 8. As an object is moved farther away from a concave mirror, its image eventually becomes:
a) Always erect and enlarged
b) Inverted
c) Invisible only
d) Same size as the object always
Answer:
b) Inverted
Question 9. In a convex mirror, the image of an object is always:
a) Erect and enlarged
b) Inverted and enlarged
c) Erect and diminished
d) Same size as the object
Answer:
c) Erect and diminished
Question 10. As the distance of an object from a convex mirror increases, the image:
a) Becomes inverted
b) Decreases slightly in size
c) Becomes larger and erect
d) Remains exactly unchanged in all respects
Answer:
b) Decreases slightly in size
Question 11. A plane mirror differs from spherical mirrors because a plane mirror always forms an image that is:
a) Erect and of the same size as the object
b) Erect and enlarged
c) Inverted and diminished
d) Always smaller than the object
Answer:
a) Erect and of the same size as the object
Question 12. Lateral inversion is observed in:
a) Plane mirror only
b) Concave mirror only
c) Convex mirror only
d) All three types of mirrors
Answer:
d) All three types of mirrors
Question 13. Which of the following uses a concave mirror?
a) Side-view mirror of a vehicle
b) Road safety mirror at a sharp bend
c) Reflector of a torch
d) Surveillance mirror in a shop
Answer:
c) Reflector of a torch
Question 14. Dentists use concave mirrors mainly because they provide an image of teeth that is:
a) Diminished and erect
b) Enlarged when held close
c) Always inverted
d) Always same-sized
Answer:
b) Enlarged when held close
Question 15. Side-view mirrors in vehicles are convex because they:
a) Produce enlarged images
b) Provide a wider field of view
c) Invert the image clearly
d) Concentrate sunlight
Answer:
b) Provide a wider field of view
Question 16. At road intersections and sharp bends, convex mirrors are used mainly to:
a) Enlarge distant vehicles
b) Provide visibility of a wider area
c) Concentrate light
d) Measure speed of vehicles
Answer:
b) Provide visibility of a wider area
Question 17. The ray of light that falls on a mirror is called the:
a) Normal ray
b) Reflected ray
c) Incident ray
d) Parallel ray
Answer:
c) Incident ray
Question 18. The line drawn perpendicular to the reflecting surface at the point of incidence is called the:
a) Tangent
b) Normal
c) Reflection axis
d) Surface line
Answer:
b) Normal
Question 19. The angle between the incident ray and the normal is called the:
a) Angle of deviation
b) Angle of reflection
c) Angle of incidence
d) Angle of mirror tilt
Answer:
c) Angle of incidence
Question 20. According to the first law of reflection:
a) Angle of incidence is greater than angle of reflection
b) Angle of incidence is equal to angle of reflection
c) Reflected ray is always perpendicular to the mirror
d) Incident ray always retraces its path
Answer:
b) Angle of incidence is equal to angle of reflection
Question 21. When a light ray falls on a mirror along the normal, the angle of incidence is:
a) 90°
b) 45°
c) 0°
d) 180°
Answer:
c) 0°
Question 22. The second law of reflection states that the incident ray, the normal, and the reflected ray all lie in:
a) Different planes
b) The same plane
c) Curved surfaces only
d) Parallel planes
Answer:
b) The same plane
Question 23. The laws of reflection are valid for:
a) Plane mirrors only
b) Spherical mirrors only
c) Plane and spherical mirrors both
d) Concave mirrors only
Answer:
c) Plane and spherical mirrors both
Question 24. When multiple parallel rays fall on a plane mirror, the reflected rays are:
a) Converging
b) Diverging
c) Also parallel
d) Inverted
Answer:
c) Also parallel
Question 25. When multiple parallel rays fall on a concave mirror, the reflected rays:
a) Remain parallel
b) Converge
c) Diverge
d) Disappear
Answer:
b) Converge
Question 26. When multiple parallel rays fall on a convex mirror, the reflected rays:
a) Converge
b) Remain parallel
c) Diverge
d) Form no image
Answer:
c) Diverge
Question 27. A concave mirror can burn a piece of paper in sunlight because it:
a) Absorbs all light
b) Converges sunlight into a small bright spot
c) Makes the paper look larger
d) Reflects no heat
Answer:
b) Converges sunlight into a small bright spot
Question 28. A lens is a piece of transparent material that usually has:
a) Flat surfaces only
b) Curved surfaces
c) Rough surfaces
d) Reflecting surfaces only
Answer:
b) Curved surfaces
Question 29. A lens thicker at the middle than at the edges is called a:
a) Concave lens
b) Plane lens
c) Convex lens
d) Diverging plate
Answer:
c) Convex lens
Question 30. A lens thicker at the edges than at the middle is called a:
a) Convex lens
b) Concave lens
c) Plane glass
d) Reflecting lens
Answer:
b) Concave lens
Question 31. When an object is placed behind a convex lens at a small distance and viewed through it, the object appears:
a) Erect and enlarged
b) Inverted and diminished
c) Erect and diminished
d) Same size and erect always
Answer:
a) Erect and enlarged
Question 32. As the object is moved farther from a convex lens, the image eventually becomes:
a) Always erect
b) Inverted
c) Invisible in every case
d) Always same-sized
Answer:
b) Inverted
Question 33. A concave lens always forms an image that is:
a) Erect and diminished
b) Erect and enlarged
c) Inverted and enlarged
d) Same size as the object
Answer:
a) Erect and diminished
Question 34 – Match the Following
| Column A | Column B |
|---|---|
| 1. Concave mirror | A. Always forms erect and diminished image |
| 2. Convex mirror | B. Reflecting surface curved inwards |
| 3. Incident ray | C. Ray of light falling on a mirror |
| 4. Normal | D. Line perpendicular to mirror at point of incidence |
| 5. Angle of reflection | E. Angle between normal and reflected ray |
Answer:
| Column A | Correct Answer |
|---|---|
| 1. Concave mirror | B. Reflecting surface curved inwards |
| 2. Convex mirror | A. Always forms erect and diminished image |
| 3. Incident ray | C. Ray of light falling on a mirror |
| 4. Normal | D. Line perpendicular to mirror at point of incidence |
| 5. Angle of reflection | E. Angle between normal and reflected ray |
Question 35 – Match the Following
| Column A | Column B |
|---|---|
| 1. Convex lens | A. Diverges light beam |
| 2. Concave lens | B. Converges light beam |
| 3. Magnifying glass | C. Example of convex lens |
| 4. Eyeglasses | D. Use of lenses in daily life |
| 5. Thin transparent glass plate | E. Lets parallel beam pass through as it is |
Answer:
| Column A | Correct Answer |
|---|---|
| 1. Convex lens | B. Converges light beam |
| 2. Concave lens | A. Diverges light beam |
| 3. Magnifying glass | C. Example of convex lens |
| 4. Eyeglasses | D. Use of lenses in daily life |
| 5. Thin transparent glass plate | E. Lets parallel beam pass through as it is |
