14. light

1. Light is a form of -

1) inertia
2) water
3) sound
4) energy

2. Which of the following is true?

1) Light is only produced by fire.
2) There are many things that produce light.
3) The sun is the only thing that can produce light.
4) The moon produces natural light.

3. All of the following are sources of light EXCEPT -

1) the sun
2) the moon
3) a light bulb
4) fire

4. Light is produced when a form of energy is changed into -

1) magnetic energy
2) chemical energy
3) nuclear energy
4) light energy

5. How long does it take light to travel from the sun to the Earth?

1) 8 years
2) 8 seconds
3) 8 minutes
4) 8 days

6. Light can be reflected or -

1) destroyed
2) warped
3) turned
4) refracted

7. Light that bounces back has been -

1) transferred
2) reflected
3) refracted
4) absorbed

8. Light that bends has been

1) transferred
2) absorbed
3) refracted
4) reflected

9. Which of the following items would most likely reflect light?

1) fire
2) mirror
3) tree
4) lens

10. All of the following items refract light EXCEPT -

1) eyeglasses
2) cameras
3) magnets
4) telescopes

11. Light is a form of

1) sound
2) inertia
3) water
4) energy

12. Light waves can travel in space

1) true
2) false

13. Light can be

1) all of these
2) absorbed
3) reflected
4) refracted

14. A magnifying class has what type of lens

1) converging
2) diverging

15. Light that bends has been

1) refracted
2) absorbed
3) reflected
4) transferred

16. The term "concave lens" refers to

1) a form of energy that can travel in waves and can move through empty space
2) the bending of light waves as they travel from one surface to another
3) a lens that is thinner in the center and thicker at the edges and bends light outward
4) a lens that is thicker in the center and thinner at the edges and bends light inward

17. The term "convex lens" refers to

1) the bending of light waves as they travel from one surface to another
2) a lens that is thinner in the center and thicker at the edges and bends light outward
3) a lens that is thicker in the center and thinner at the edges and bends light inward
4) a form of energy that can travel in waves and can move through empty space

18. White light is made up of many colours

1) true
2) false

19. When raindrops refract light it causes

1) white light
2) a rainbow
3) a solar eclipse
4) singing in the rain

20. Which of the following colours is NOT in a rainbow

1) indigo
2) orange
3) green
4) brown

21. A green book is green because

1) it reflects blue and yellow
2) it reflects every colour of light except green
3) it absorbs every colour of light except green
4) it is recyclable

22. Which colour has the highest frequency?

1) violet
2) yellow
3) green
4) red

23. You can not see a reflection on a rough surface because rough surfaces

1) scatter light rays that hit them
2) produce curved reflections, like funhouse mirrors
3) reflect light waves in a single direction
4) are always opaque

24. The lenses inside your eyes are

1) opaque
2) convex
3) concave
4) asymmetrical

25. Light bends when it moves from one medium to another

1) moves from one medium to another
2) changes from one colour to another
3) becomes absorbed
4) changes from one wavelength to another

26. When something completely allows light to pass through

1) it's translucent
2) it reflects
3) it's transparent
4) it's blue

27. What allows some light to pass through, but the image is not clear?

1) opaque
2) transparent
3) translucent
4) convex

28. What does not allow light to pass through it?

1) opaque
2) absorb
3) translucent
4) transparent

29. When light waves bounce back they

1) transmit
2) reflect
3) refract
4) absorb

30. Why do some objects appear white?

1) They are made of cotton
2) They reflect all colours
3) They are blue and refect white
4) They absorb all colours

31. What happens to light rays when they move from water into air?

1) They switch to white light
2) They spread out and bend
3) They slow down
4) They change speed, direction, and bend

32. The law of reflection states that the angle of incidence

1) doesn't matter
2) is half the size of the angle of reflection
3) is always equal to the angle of reflection
4) is double the size of the angle of reflection

33. Which of the following is NOT specular reflection?

1) Which of the following is NOT specular reflection?
2) the image is identical to the reflected object and reversed
3) the parallel incident light rays are reflected in parallel
4) the reflected surface is mercury

34. Which is untrue about light waves?

1) they are electromagnetic
2) they are longitudinal
3) travel in straight lines
4) they are transverse

35. Which lens will correct hyperopia?

1) diverging
2) focal point
3) concave
4) convex

36. A concave lens always creates a virtual image.

1) true
2) false

37. A convex lens creates an upright image...

1) when the object is in between the focal point and the lens
2) always
3) never
4) when the object is more than twice the distance of the focal point away from the lens

38. A convex lens

1) always creates an inverted image
2) always creates a virtual image
3) always creates a real image
4) can create a virtual or real image

39. Myopia is better known as...

1) nearsightedness
2) 20/20 vision
3) farsightedness
4) blind

40. Which vision problem is usually caused by the ageing of a lens' support muscles?

1) myopia
2) hyperopia
3) youropia
4) presbyopia

41. Diffuse reflection is when...

1) light waves are reflected in all directions
2) light waves are reflected straight up
3) light waves are not reflected
4) light waves are reflected in one direction

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