Light energy Quiz - ICSE Class 7 Science

Free practice quiz: Light energy (ICSE Class 7 Science). 46 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 7 Science practice quiz has 46 multiple-choice questions on Light energy, and 46 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. When light travels from one medium to another, say from air to water, its path bends. This phenomenon is known as:

   1. Reflection
   2. Refraction
   3. Diffraction
   4. Dispersion
   Show answer

   Answer: B. Refraction

   Refraction is the bending of light as it passes from one medium to another, due to the change in its speed.

2. The phenomenon where light bounces back from a surface is called:

   1. Refraction
   2. Diffraction
   3. Reflection
   4. Absorption
   Show answer

   Answer: C. Reflection

   Reflection is the bouncing back of light when it strikes a surface.

3. A virtual image is:

   1. Always inverted
   2. Can be projected onto a screen
   3. Formed by the actual convergence of light rays
   4. Cannot be projected onto a screen
   Show answer

   Answer: D. Cannot be projected onto a screen

   A virtual image is formed where light rays appear to diverge from, not where they actually meet. Therefore, it cannot be projected onto a screen. It is always erect.

4. When light travels from a denser medium to a rarer medium, it bends:

   1. Towards the normal
   2. Away from the normal
   3. Parallel to the normal
   4. Does not bend
   Show answer

   Answer: B. Away from the normal

   When light passes from a denser medium to a rarer medium, its speed increases, causing it to bend away from the normal.

5. When light enters a rarer medium from a denser medium, the angle of refraction is:

   1. Equal to the angle of incidence
   2. Less than the angle of incidence
   3. Greater than the angle of incidence
   4. Zero
   Show answer

   Answer: C. Greater than the angle of incidence

   When light moves from a denser to a rarer medium, its speed increases, and it bends away from the normal. This means the angle of refraction is greater than the angle of incidence.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which of the following optical phenomena is responsible for the formation of rainbows?
2. A periscope works on the principle of:
3. When light rays converge at a point after reflection or refraction, this point is called the:
4. The phenomenon of splitting of white light into its constituent colors when it passes through a prism is called:
5. The image formed by a plane mirror is:
6. Which of the following statements about the speed of light is correct?
7. When an object is placed at the principal focus of a concave mirror, the image formed is:
8. Which optical device is used to correct myopia (nearsightedness)?
9. The bending of light when it passes through a small aperture or around an obstacle is called:
10. Which of the following colors of visible light has the shortest wavelength?
11. The angle of incidence is equal to the angle of reflection. This is known as the:
12. What happens to the parallel rays of light after they strike a convex lens?
13. Which type of lens is thicker in the middle and thinner at the edges?
14. The phenomenon of light scattering by particles in the atmosphere that causes the sky to appear blue is called:
15. An object is placed at the center of curvature of a concave mirror. The image formed will be:
16. Which surface is responsible for the reflection of light in a plane mirror?
17. The focal length of a convex lens is taken as:
18. When light travels from a rarer medium to a denser medium, it bends:
19. The separation of white light into its constituent colors when passing through a prism is due to the difference in the:
20. The SI unit of luminous intensity is:
21. Which phenomenon causes a magnifying glass to work?
22. The image formed by a convex lens when the object is placed at infinity is:
23. Which of the following colors has the longest wavelength?
24. The scattering of sunlight by atmospheric particles causing the sun to appear red during sunrise and sunset is an example of:
25. The part of the eye that functions like a lens to focus light onto the retina is the:
26. Which device uses the principle of reflection to form images of distant objects?
27. The lateral inversion caused by a plane mirror means that:
28. The unit of luminous flux, which measures the total amount of visible light emitted by a source, is:
29. When light passes from glass to air, the critical angle is the angle of incidence in glass for which the angle of refraction in air is:
30. Which of the following is an example of a diffused reflection?
31. A concave lens can be used to correct:
32. The image formed by a convex lens when the object is placed between the optical center and the principal focus is:
33. Which of the following colours of light has the least deviation when passed through a prism?
34. The unit of illuminance, which measures the amount of light falling on a surface, is:
35. Which type of mirror is used as a shaving mirror or in dental clinics to see enlarged images of teeth?
36. The phenomenon that allows us to see objects is:
37. When an object is placed at infinity and viewed through a convex lens, the image formed is:
38. The Tyndall effect is the scattering of light by:
39. The principal axis of a mirror or lens is:
40. Which phenomenon is responsible for the sparkling of diamonds?
41. What is the term for the point where light rays converge after passing through a convex lens?

More quizzes

• Motion▶ Play
• Physical quantities and measurement▶ Play
• Sound▶ Play
• Electricity and magnetism▶ Play
• Energy and simple machines▶ Play
• Heat▶ Play

Browse all Physics quizzes

More to play