1. A review for the quiz
Light Waves

2. Sound waves from a radio generally travel in which medium?
air
light
earth
water

3. Our eyes can detect light only within a range of _____ called visible light.
frequencies
mediums
speeds
periods

4. The speed of a sound wave
depends on wavelength.
depends on amplitude.
depends on the medium.
None of the above

5. Longitudinal waves travel quickly in a _____ because the molecules are closely packed and physically bonded together.
liquid
solid
gas
None of the above

6. The differences in color in visible light, such as those in a rainbow, are caused by differences in
amplitude.
medium.
speed.
frequency.

7. Light waves
require a medium.
cannot travel through liquids.
cannot travel through solids.
are electromagnetic waves.

8. Light waves are
transverse waves.
rotating waves.
longitudinal waves.
circular waves.

9. The color of light is determined by the _____ of the light waves.
medium
frequency
speed
amplitude

10. Which type of electromagnetic waves has the highest energy?
gamma rays
infrared
ultraviolet light
microwaves

11. Which type of electromagnetic radiation is used to kill cancer cells?
microwaves
ultraviolet rays
gamma rays
sunlight

12. Radar works by sending a signal out from an air-traffic control tower that is
analyzed by a Doppler scanner on the ground.
reflected off a plane back to the control tower.
increased in intensity as it passes through the atmosphere.
scanned and analyzed by a receiver on board an airplane.

13. The color that an object appears to be depends on the
angle at which visible light is reflected off the object.
use of additive rather than subtractive colors.
wavelengths of visible light that reaches your eyes.
speed with which visible light reaches it.

14. When light moves from a material in which its speed is higher to a material in which its speed is lower, it is
bent toward the normal.
reflected off the boundary.
bent away from the normal.
changed into a virtual image.

15. Light rays that pass through a lens change direction because
of internal reflection.
they are refracted.
light is broken up into many different colors.
virtual images always appear slightly larger than real images.

16. Light demonstrates wave characteristics when it is
reflected.
diffracted.
refracted.
All of the above

17. Light demonstrates particle characteristics when it
knocks electrons off a metal surface.
forms standing waves.
passes through a narrow opening.
All of the above

18. As the frequency of light waves increases,
the energy increases.
the energy stays the same.
the energy decreases.
the wavelength increases.

19. Light rays reflecting off a rough surface reflect
diffusely.
at all angles.
at a single angle.
None of the above

20. The law of reflection says the angle of incidence is _____ the angle of reflection.
greater than
equal to
less than
None of the above

21. When you look in a convex mirror, the image appears
smaller than it really is.
larger than it really is.
lighter than it really is.
darker than it really is.

22. Which statement about a diverging lens is correct?
It bends light inward and can create either a virtual or a real image.
It bends light inward and can only create a real image.
It bends light outward and can create either a virtual or a real image.
It bends light outward and can only create a virtual image.

23. Light is composed of waves and particles called:
electrons
photons
quarks
waves

24. The visible spectrum of light from the longest to shortest wavelength is:
violet, indigo, blue, green, yellow, orange, red
red, orange, yellow, green, blue, indigo, violet
infrared, ultraviolet, gamma, x-rays, microwaves
green, orange, red, violet

25. A magnifying glass is an example of a:
convex lens
prism
concave lens
convex mirror

26. Convex lenses converge light rays to a:
real image
focal point
focus
virtual image

27. An example of a diverging lens that spreads light rays is the:
convex lens
converging lens
concave lens
prism

28. A survivor from a shipwreck sees an image of a fish in the water
A survivor from a shipwreck sees an image of a fish in the water. To catch it with her spear, she must
aim above the image of the fish
aim at the image of the fish
aim below the image of the fish
aim behind the fish

29. When the crests of one wave overlap the crests of another wave or wave, this occurs
diffraction
constructive interference
destructive interference
resonant frequencies

30. An echo is the result of a
reflected sound wave
refracted sound wave
diffracted sound wave
dispersed sound wave

31. What happens to a wave when it is refracted?
It is bent
It is reflected
It is diffracted
It is radiated

32. optics
convex
image
convergent
object
divergent
concave
____ 31. The study of how light behaves.
____ 32. A lens or mirror that is bigger in the middle.
____ 33. light rays that spread apart
____ 34. Where your eyes think something is.
____ 35. Light ray that come together.
____ 36. What you are actually looking at.
____ 37. A lens or mirror that is bigger at the ends.

33. ____ 40. from the normal to the incoming ray.
angle of reflection
Mirror
lens
angle of incidence
focus
____ 38. a line drawn perpendicular to the surface of a mirror or lens
____ 39. An optical device that works by refraction to bend light.
____ 40. from the normal to the incoming ray.
____ 41. from the normal to the outgoing ray
____ 42. Where all parallel rays come together
____ 43. an optical device that works by reflection

34. ____ 45. all light: visible and invisible
photon
EM Spectrum
prism
energy level
light
____ 44. An orbit of electrons. To move from low to high requires energy.
____ 45. all light: visible and invisible
____ 46. used to separate white light into its colors
____ 47. a single particle or packet of light
____ 48. a wave that can travel through a vacuum

35. Arrange the Electromagnetic Spectrum from low photon energy to high photon energy
Gamma Rays
X-rays
Infrared
Ultraviolet
Microwaves
Visible Light
Radio Waves
____ 49. Lowest Photon Energy
____ 50. ______
____ 51. ______
____ 52. ______
____ 53. ______
____ 54. ______
____ 55. Highest Photon Energy

36. Convex and Concave Lens

37. Convex and Concave Mirrors

38. Primary Colors of Light

39. Total internal Refraction

40. Mirage- Optical Illusions
two opposing parabolic mirrors

41. Fun with Refraction and Reflection