Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PHY1020 > Final Exam > Flashcards

Final Exam Flashcards

1
Q

An indication that light is a wave is

A

that it has dark bands in the diffraction period

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The colors of an oil slick indicate that

A

light as a wave

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The “index of refraction” measures

A

the speed of light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Light waves are

A

transverse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The resolution of a human eye is about

A

1/60 degree

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which of the following has the lowest index of refraction?

A

air

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

As the wavelength of light decreases, the frequency

A

increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

In one millionth of a second, light will travel (caution: possibly a trick question)

A

about 1000 feet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

A piece of glass is shaped like a pyramid. The side of the pyramid is tilted at 45 degrees with respect to the horizontal. A beam of light is inside the glass, moving horizontally. When it emerges from the tilted surface of the glass, it will be moving

A

in a direction that is tilted downward (so it will eventually hit the ground)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

A stop sign is bright when you shine the headlamps of your car on it. It most likely is covered with

A

small glass spheres

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Diamonds sparkle in many colors because

A

light velocity depends on color

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which of the following are retroreflectors? Choose all that apply.

A

All of the above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Two soap bubbles from the same soap appear to be different colors. They probably have

A

Different thickness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

If c is the speed of light in a vacuum, then the speed of light in glass is approximately

A

(2/3) c

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Stealth bombers are undetected by radar, in part because

A

Of the absence of corner reflectors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Rainbows show different colors because

A

In water, different frequencies have different velocities

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Which of the following is polarized?

A

Blue sky light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

A fiber can send much more information per second than a wire because

A

Light has a very high frequency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Which color of light would give the highest number of bits per second in fiber optics?

A

Blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Shannon is famous for having invented or discovered (among other things):

A

The bit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

The human eye has cones that detect

A

green, blue, red

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

People squint to see better because squinting

A

Reduces the blur size

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Old people need reading glasses because their

A

Lenses become less flexible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Red-eye in photographs comes from

A

Light on the flash reflecting off the retina (the back of the eye)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Red-eye demonstrates that

A

the eye is a retroREflector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Your eye has

A

TWO LENSES - the lens and the CORNEA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Light is polarized when it bounces off (choose all that are correct)

A

All of the Above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Sunglasses can help you see a fish underwater because

A

Reflected light is polarized

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Polaroids are used for 3-D movies because

A

they give a different image to each eye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Stress in plastic can be detected by looking at

A

polarized light (crossed polaroids)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

In the pinhole camera, more blurring occurs if

A

the hole is either very large or very small

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Holograms depend on the fact that light

A

is a wave

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

A successful fisherman will throw the spear

A

below the fish image

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

To make a spy satellite that can read a license plate, you would have to

A

use a large mirror

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

The wavelength of visible light is closest to the diameter of

A

a red blood cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

The Keck telescope is “powerful” because

A

it has a bigger mirror to collect light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

When we say a man is color blind, we usually mean that

A

He can’t distinguish red from green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

The Keck uses what to focus light?

A

a mirror

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Light in a vacuum goes 1 foot every nanosecond (billionth of a second). In water, in one nanosecond it will go about

A

0.66 foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

Present day 3-D movies make use of which technology?

A

Polarizers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

A computer screen does not have spots that are colored

A

White

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

For a good telescope (like Hubble) in geosynchronous orbit (HEO), a typical resolution (for objects on the surface) is about

A

20 feet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

A major use of fiber optics is for

A

communication

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

Which of the following has the highest frequency?

A

gamma rays

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

Which of the following has the lowest frequency?

A

AM radio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

If you double the absolute temperature of an object, the wavelength of the emitted light

A

Gets shorter by a factor of 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

Which kind of light have the longest wavelength?

A

Infrared light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

“Invisible light” includes

A

x-rays, UV and IR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

As an object gets hotter and hotter, the color of its glow will change from

A

red, to yellow, to white, to blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

Radio waves and x-rays have the

A

Same speed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

If you double the absolute temperature, the total radiation

A

Increases by 16

52
Q

Most of the energy of an ordinary tungsten-filament lightbulb is emitted in the color

A

Infrared

53
Q

Heat radiation is also called

A

IR

54
Q

A tungsten lightbulb has 100 watts printed on it. About how much power is actually emitted as visible light?

A

16 Watts

55
Q

What color star would be the hottest?

A

Blue

56
Q

Sunlight is brightest in which color?

A

green

57
Q

Which of the following exposes a person to the kind of radiation that can cause cancer? (Choose all that apply.)

A

computer-aided tomography (CAT) scans

58
Q

Because of their warmth, humans emit primarily

A

Infrared radiation

59
Q

If you sleep under a tree, you won’t get wet from morning dew. That’s because the tree

A

emits infrared radiation

60
Q

Dew forms when the ground cools

A

by emitting IR

61
Q

A “heat-seeking” missile actually aims itself toward

A

Infrared light

62
Q

The ozone layer is created by and absorbs

A

Ultraviolet radiation

63
Q

Ozone depletion is caused by (choose all that are correct)

A

CFCs

64
Q

A few years ago, a certain kind of spray can was banned. These were the cans that used

A

Chlorofluorocarbons (CFCs)

65
Q

Multispectral refers to

A

the many colors in visible light

66
Q

The name NMR has been changed to

A

MRI

67
Q

Which of the following statements about the ozone layer is NOT true?

A

Ozone is the most important greenhouse gas

68
Q

The clouds in thunderstorms rise until they reach

A

the ozone layer

69
Q

The original name for the microwave oven was

A

radar range

70
Q

Microwave ovens use radiation with a wavelength

A

Same as radar

71
Q

The microwaves in a microwave oven mostly heat

A

water

72
Q

MRI maps the distribution of which element to produce an image?

A

hydrogen

73
Q

UV light (choose all that are correct)

A
  • is responsible for sunburns and windburns,
  • is used to kill bacteria in the water of remote villages in India,
  • is also called black light
74
Q

Which of the following is best for seeing the calcium in bones?

A

x-ray

75
Q

A black light is designed to emit

A

UV

76
Q

A positron is

A

an antielectron

77
Q

Sunburn is usually cause by

A

UV radiation

78
Q

Which of the following uses antimatter?

A

PET scan

79
Q

To image the hydrogen in the body, use

A

MRI

80
Q

What is the cause for “windburn”?

A

solar UV

81
Q

Remote control of a TV is usually done using

A

IR

82
Q

Pit vipers and mosquitoes can sense

A

IR radiation

83
Q

Infrared radiation can (choose all that apply)

A

Help snakes locate prey

84
Q

Cancer is most likely to be caused by

A

ultraviolet radiation

85
Q

The advertising slogan “whiter than white” means that the material

A

emits visible light

86
Q

To make clothes appear extra clean, manufacturers apply

A

fluorescent dyes

87
Q

Which of the following is a typical energy for an x-ray?

A

50,000 eV

88
Q

In total darkness, you can see people if you have a camera that is sensitive to

A

Infrared radiation

89
Q

Cell phones emit

A

microwaves

90
Q

Each of these make use of infrared radiation EXCEPT

A

Measurement of wave velocities in the ocean

91
Q

Bats navigate in caves by using

A

ultrasound

92
Q

The phosphor of a fluorescent lightbulb turns which of these into visible light?

A

Ultraviolet light

93
Q

“Cool roofs”

A

must reflect infrared

94
Q

The best kind of radiation to purify water is

A

UV

95
Q

Which of the following are electromagnetic waves? Choose all that are appropriate (no partial credit).

A

all of the above

96
Q

To image hydrogen in the brain, the best technique is

A

MRI

97
Q

Which of the following is an advanced method that uses x-rays?

A

CAT

98
Q

Higher carbon dioxide levels than we have now were last seen about

A

2 million years ago

99
Q

The country that produces the most carbon dioxide each year is

A

China

100
Q

The country that produces the most carbon dioxide per person every year is

A

Saudia Arabia

101
Q

The greenhouse effect currently warms the Earth by approximately (careful: this may be a trick question)

A

15/25 degrees F

102
Q

Which fossil fuel produces the most CO2, per pound, when burned?

A

coal

103
Q

Converting coal to oil is achieved with

A

Fisher-Tropsch

104
Q

Carbon dioxide in the atmosphere has increased over the past 100 years by

A

36%

105
Q

Ice in Antartica is

A

increasing, contradicting global warming predictions

106
Q

A treaty that was signed by the United States but not ratified by the Senate is

A

Kyoto

107
Q

According to the text, wind power is

A

rapidly growing, with wind turbines delivering twice the power they did four years ago

108
Q

Clean coal

A

refers to coal used at a power plant with carbon capture and storage (CCS)

109
Q

In France, nuclear power produces what percentage of the electricity?

A

80%

110
Q

In the United States, nuclear power produces what percentage of the electricity?

A

20% or 0.2

111
Q

The organization that studies climate change is

A

IPCC

112
Q

Which of these years had the warmest worldwide climate?

A

1998

113
Q

If the United States reduced CO2 emissions to those suggested by the Kyoto treaty, and the developing nations continued to increase theirs at the current (allowed) rate, then global warming would be delayed by about

A

3 years

114
Q

The greenhouse effect involves atmospheric emission of

A

IR

115
Q

To be affordable without subsidy or carbon credits, the cost of a billion-watt solar plant must be not much more than

A

$1 billion

116
Q

The average temperature of the Earth (including the poles and the equator) is now about

A

57 degrees F

117
Q

Which country produces the most greenhouse gas emission per GDP (gross domestic product)?

A

China

118
Q

A key feature of the Kyoto treaty is that it

A

set up to a method to trade carbon credits

119
Q

Cooling in the last big ice age, which ended about 12,000 BC, was approximately

A

11 degrees F

120
Q

Cooling during the Little Ice Age (AD 1350 to 1850) was approximately

A

2 degrees F

121
Q

Which of the following is NOT a major greenhouse gas?

A

CFCs (such as Freon)

122
Q

The least expensive form of carbon abatement (putting less CO2 into the atmosphere) is

A

conservation

123
Q

Thanks to humans, the carbon dioxide in the atmosphere has

A

increased by about 35%

124
Q

UV light is NOT

A

also called heat radiation

125
Q

Which of these does NOT make use of infrared radiation

A

measurement of wave velocities in the ocean

PHY1020 (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions