Light is a natural phenomenon that helps us see the world. Chapter 13 of Class 8 Science has details about the behavior of light and its properties. It contains concepts like reflection, refraction, dispersion, and the working of the human eye. You are going to learn how mirrors and lenses form images and how light bends when it passes through different mediums.
We have 35 MCQs and 1 match-the-following question for this chapter below. It will help you revise important concepts. Some important topics covered are lateral inversion, dispersion of light into seven colors, and the parts of the eye that help us see.
Class 8 Science Chapter 13 MCQ Online Test Questions and Answers
Question 1. What makes objects visible?
a) Reflection of light
b) Absorption of light
c) Absence of light
d) Emission of heat
Answer:
a) Reflection of light
Question 2. What is the angle between the normal and the incident ray called?
a) Angle of reflection
b) Angle of incidence
c) Critical angle
d) Reflected angle
Answer:
b) Angle of incidence
Question 3. Which of these is a characteristic of a plane mirror?
a) Inverted image
b) Virtual image
c) Real image
d) Enlarged image
Answer:
b) Virtual image
Question 4. What is the phenomenon of splitting white light into colors called?
a) Refraction
b) Dispersion
c) Reflection
d) Absorption
Answer:
b) Dispersion
Question 5. What type of reflection occurs from rough surfaces?
a) Regular reflection
b) Diffused reflection
c) Total internal reflection
d) Multiple reflection
Answer:
b) Diffused reflection
Question 6. What forms a virtual image behind a mirror?
a) Plane mirror
b) Concave mirror
c) Convex lens
d) Convex mirror
Answer:
a) Plane mirror
Question 7. What is lateral inversion?
a) Upside-down image
b) Left and right reversal
c) Enlargement of image
d) Reduction of image size
Answer:
b) Left and right reversal
Question 8. How many colors does white light split into?
a) Five
b) Seven
c) Eight
d) Six
Answer:
b) Seven
Question 9. What does the iris control in the eye?
a) Size of the pupil
b) Shape of the retina
c) Color of the cornea
d) Strength of the optic nerve
Answer:
a) Size of the pupil
Question 10. What helps us see in dim light?
a) Cones
b) Rods
c) Pupil
d) Retina
Answer:
b) Rods
Question 11. What is the name of the blind spot in the eye?
a) Iris
b) Optic nerve junction
c) Retina spot
d) Cornea region
Answer:
b) Optic nerve junction
Question 12. What is used to observe multiple reflections?
a) Convex mirror
b) Kaleidoscope
c) Plane mirror
d) Concave lens
Answer:
b) Kaleidoscope
Question 13. What part of the eye focuses light on the retina?
a) Cornea
b) Iris
c) Lens
d) Optic nerve
Answer:
c) Lens
Question 14. What causes a rainbow?
a) Reflection of sunlight
b) Dispersion of light by water droplets
c) Absorption of sunlight
d) Refraction through the atmosphere
Answer:
b) Dispersion of light by water droplets
Question 15. What are objects that emit their own light called?
a) Illuminated objects
b) Luminous objects
c) Reflective objects
d) Absorptive objects
Answer:
b) Luminous objects
Question 16. Which animals have large numbers of rods in their eyes?
a) Day birds
b) Night birds
c) Crabs
d) Butterflies
Answer:
b) Night birds
Question 17. What is the characteristic feature of a periscope?
a) Uses two plane mirrors
b) Uses convex lenses
c) Uses concave mirrors
d) Uses a combination of lenses
Answer:
a) Uses two plane mirrors
Question 18. What happens to the pupil in bright light?
a) It expands
b) It contracts
c) It stays the same size
d) It changes shape
Answer:
b) It contracts
Question 19. What is the purpose of a kaleidoscope?
a) To study stars
b) To create patterns using multiple reflections
c) To focus light on objects
d) To study the dispersion of light
Answer:
b) To create patterns using multiple reflections
Question 20. What is the minimum distance for distinct vision in humans?
a) 15 cm
b) 20 cm
c) 25 cm
d) 30 cm
Answer:
c) 25 cm
Question 21. What is the main function of the retina in the human eye?
a) Controls the size of the pupil
b) Focuses light on the optic nerve
c) Converts light into electrical signals
d) Reflects light back into the eye
Answer:
c) Converts light into electrical signals
Question 22. What happens to light when it hits a smooth, shiny surface?
a) It is absorbed
b) It is reflected
c) It is refracted
d) It is diffused
Answer:
b) It is reflected
Question 23. What is the phenomenon of light bending as it passes through a medium called?
a) Reflection
b) Refraction
c) Dispersion
d) Scattering
Answer:
b) Refraction
Question 24. What type of image is formed by a plane mirror?
a) Real and inverted
b) Virtual and erect
c) Magnified and real
d) Reduced and virtual
Answer:
b) Virtual and erect
Question 25. What is the natural phenomenon that proves light travels in a straight line?
a) Rainbow
b) Eclipse
c) Shadow formation
d) Kaleidoscope
Answer:
c) Shadow formation
Question 26. What kind of reflection occurs on a polished surface?
a) Diffused reflection
b) Regular reflection
c) Scattered reflection
d) Irregular reflection
Answer:
b) Regular reflection
Question 27. What causes red-eye in flash photography?
a) Reflection of light from blood vessels in the retina
b) Refraction of light by the cornea
c) Overexposure to light
d) Dispersion of light
Answer:
a) Reflection of light from blood vessels in the retina
Question 28. What happens to light when it passes through a prism?
a) It bends but does not split
b) It splits into seven colors
c) It reflects back
d) It becomes invisible
Answer:
b) It splits into seven colors
Question 29. Which part of the eye controls the amount of light entering it?
a) Retina
b) Lens
c) Iris
d) Cornea
Answer:
c) Iris
Question 30. Which optical device uses a convex lens?
a) Periscope
b) Magnifying glass
c) Kaleidoscope
d) Plane mirror
Answer:
b) Magnifying glass
Question 31. What type of reflection makes objects visible to us?
a) Regular reflection
b) Diffused reflection
c) Total internal reflection
d) Scattering of light
Answer:
b) Diffused reflection
Question 32. What does the optic nerve do in the eye?
a) Reflects light
b) Carries signals to the brain
c) Focuses light on the retina
d) Controls the size of the pupil
Answer:
b) Carries signals to the brain
Question 33. What is the process of correcting defective vision using lenses called?
a) Refraction
b) Dispersion
c) Vision correction
d) Optometry
Answer:
c) Vision correction
Question 34. Which natural phenomenon shows the dispersion of light in the atmosphere?
a) Mirage
b) Lightning
c) Rainbow
d) Eclipse
Answer:
c) Rainbow
Question 35. What causes difficulty in seeing distant objects clearly?
a) Myopia
b) Hypermetropia
c) Astigmatism
d) Cataract
Answer:
a) Myopia
Question 36 – Match the Following
| Column A | Column B |
|---|---|
| 1. Reflection of light | A. Retina |
| 2. Splitting of white light | B. Lens |
| 3. Part of the eye that controls light entry | C. Dispersion |
| 4. Device with multiple reflections | D. Kaleidoscope |
| 5. Bending of light through a prism | E. Iris |
| 6. Converts light into signals | F. Regular reflection |
| 7. Focuses light on the retina | G. Refraction |
Answer:
| Column A | Correct Answer |
|---|---|
| 1. Reflection of light | F. Regular reflection |
| 2. Splitting of white light | C. Dispersion |
| 3. Part of the eye that controls light entry | E. Iris |
| 4. Device with multiple reflections | D. Kaleidoscope |
| 5. Bending of light through a prism | G. Refraction |
| 6. Converts light into signals | A. Retina |
| 7. Focuses light on the retina | B. Lens |
