Chapters 17-19

Question 1

15. (17.1)

Because light travels in a straight line and casts a shadow, Isaac Newton hypothesized that light is…

Answer 1

a stream of particles.

Question 2

6. (17.2)

To determine the speed of a wave, you would use what formula?

Answer 2

speed=wavelength*frequency

Question 3

1. (17.1)

A mechanical wave generally does not

Answer 3

Move the medium from one place to another

Question 4

8. (17.3)
   Suppose two waves collide and the temporary combined wave that results is smaller than the original waves. What term best describes this interaction?

Answer 4

destructive interference

Question 5

16. (18.1)

Photons travel outward from a lightbulb in

Answer 5

all directions

Question 6

28. (19.1)

A mirror with a flat surface is a

Answer 6

plane mirror

Question 7

29. (19.1)

Unlike a virtual image, a real image

Answer 7

can be viewed on a screen

Question 8

3. (17.1)

Which wave causes the medium to vibrate only in a direction parallel to the wave’s motion?

Answer 8

a longitudinal wave

Question 9

2. (17.1)

Which type of mechanical wave needs a source of energy to produce it?

Answer 9

A transverse wave, surface wave, and longitudinal wave. (All of the above)

Question 10

4. (17.1)

A disturbance sends ripples across water in a tub. These ripples are an example of a

Answer 10

surface wave

Question 11

18.1

An electromagnetic wave in a vacuum has a wavelength of 0.07 m. What is its frequency?

Answer 11

f = 4.3 * 10^9 Hz

Question 12

18.1

Light acts like

Answer 12

both a wave and a particle.

Question 13

18.4

The primary colors of light are

Answer 13

red, blue, green

Question 14

18.5

An incandescent light bulb produces light when electrons flow through the

Answer 14

filament.

Question 15

18.2

X-ray photographs show softer tissue

Answer 15

as dark, highly exposed areas

Question 16

18.5

Which of the following in NOT true regarding neon lights?

Answer 16

All neon lights are colored by the color of the tubing

Question 17

18.5

A fluorescent light tube usually contains

Answer 17

mercury vapor

Question 18

17.2

To what is amplitude related?

Answer 18

Both the amount of energy carried by the wave and the maximum displacement from the rest position.

Question 19

17.4

Sonar equipment sends sound waves into deep water and measures

Answer 19

the time delay of the returning echoes.

Question 20

17.4

A piano, violin, or guitar uses the resonance of a wooden soundboard to

Answer 20

amplify the sound.

Question 21

17.1

In an earthquake, a P wave is a longitudinal wave. It moves through soil and rock as a

Answer 21

series of compressions and rarefactions.

Question 22

19.4

how does a compound microscope produces the image you see?

Answer 22

The objective lens magnifies an image, and the eyepiece lens is used to focus the image.

Question 23

19.4

The lens of the human eye focuses light by

Answer 23

controlling the amount of light entering the eye.

Question 24

19.2

A concave lense can only form a?

Answer 24

Virtual image

Question 25

19.2 | An object located between a convex lense and its focal point forms a (an)?

Answer 25

Enlarged virtual image

Question 26

19.3 | Which part of a film camera focuses incoming light rays?

Answer 26

lens

Question 27

18.2 | Light amplification by stimulated emission of radiation is known as_______________light.

Answer 27

visible

Question 28

18.5 | To form white light from the combination of only two colors of light, the colors must be_______________.

Answer 28

complementary colors of light.

Question 29

18.3 | Polarized sunglasses work by

Answer 29

blocking light waves that vibrate in one plane

Question 30

19.2 | An object located between a convex lens and its focal point forms a (an)

Answer 30

magnified virtual image is formed

Question 31

11. (18.1) | In 1926, Michelson was able to measure the speed of light using

Answer 31

mirrors.

Question 32

41. (17.1) | You can make a wave in a rope by adding _______ at one end of the rope.

Answer 32

energy

Question 33

42. (17.2) | The trough of a transverse wave is most similar to a(an) _______ in a longitudinal wave.

Answer 33

rarefaction

Question 34

43. (17.2) | To compare the energy of different waves, measure the _______ of the waves.

Answer 34

amplitude

Question 35

44. (17.2) | Ocean waves will not bend if they approach the shore _______.

Answer 35

head-on

Question 36

45. (17.3) | If two waves collide and form a temporary smaller wave, the interference is _______.

Answer 36

destructive

Question 37

46. (17.3) | At the _______ of a standing wave, there is no displacement from the rest position.

Answer 37

node (or nodes)

Question 38

47. (17.3) When a person plucks a guitar string, the number of half wavelengths that fit into the length of the string determines the _______ of the sound produced.

Answer 38

frequency (or pitch)

Question 39

48. (17.4) | The speed of light in a vacuum is _______ m/s.

Answer 39

3x10^8 (or 300,000,000)

Question 40

49. (18.1) | Objects that scatter some of the light that is transmitted through them are _______.

Answer 40

translucent

Question 41

50. (18.3) | When viewed in yellow light, an object that reflects all the colors of light will appear _______.

Answer 41

yellow

Question 42

51. (18.4) | Light is produced when _______ change energy levels in an atom.

Answer 42

electrons

Question 43

53. (18.2) | Light amplification by stimulated emission of radiation is known as _______ light.

Answer 43

laser

Question 44

55. (18.4) | The following electromagnetic waves are arranged in order of increasing frequency: infrared, _______, ultraviolet.

Answer 44

visible light

Question 45

56. (18.2) The angles of incidence and reflection are the angles that rays make relative to a line drawn _______ to the surface of a mirror.

Answer 45

perpendicular (or at right angles)

Question 46

58. (19.1) | The type of image that can be projected on a screen is a(an) _______ image.

Answer 46

real

Question 47

59. (19.1) | A bowl shape that could hold water can be described as having a(an) _______ shape.

Answer 47

concave

Question 48

60. (19.3) | Like a human eye, a film camera has a convex ______ that forms an upside-down image.

Answer 48

lens