Chapters 11,12,13 Flashcards

You may prefer our related Brainscape-certified flashcards:
0
Q

Photon

A

Mass-less energy particle that make up light

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

Electromagnetic wave

A

Created by vibrating electric charges- moves through a vacuum

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

Gamma ray

A

Emitted from a decaying atomic nucleus 100 trillionths of a meter

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

Infrared wave

A

Waves that change to heat when absorbed 1mm to 700 billionths of a meter

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

Microwave

A

Wavelengths range from .1mm to 30 cm

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

Radio wave

A

Used for communication. Wavelengths are longer than 10 cm

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

Ultraviolet wave

A

EM wave with wavelength between 400 billionths and 10 billionths of a meter

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

Visible light

A

Can be detected by the human eye 700 to 400 billionths of a meter

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

X-Ray

A

Used for medical imaging 10 billionth of a meter to 10 trillionths of a meter

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

Analog signal

A

An electric signal whose values change over time

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

Carrier wave

A

Specific frequency that a radio station is assigned and uses to broadcasts signals

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

Digital signal

A

An electric signal with only two possible values

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

Modulation

A

Process of adding a signal to a carrier wave by altering the carrier waves amplitude

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

Transceiver

A

Device that transmits radio signals at one frequency and receives radio signals at a different frequency

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

GPS

A

A system of satellites and ground monitoring stations that enable a receiver to determine its location at or above the earths surface

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

Compare and contrast sound waves and electromagnetic waves

A

Sound waves require and medium, and are compressional

Electromagnetic waves are produced by vibration

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

How are moving electric charges related to electric and magnetic Fields?

A

They both have surrounding electric and magnetic fields. They exert a force even when the on ejecting in contact

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

What is radiant energy?

A

Energy carried by an electromagnetic wave, it helps by heating the earth

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

What is the speed of a vacuum, air,and water?

A

Vacuum- 300,000 km/s
Air-299,000 km/s
Water- 226,000 km/s

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

How are wavelength, frequency, intensity, and energy related in a electromagnetic wave?

A

All waves have wavelengths, frequencies, and intensities. As the frequency increases wavelengths become smaller

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

The range of frequencies in which electromagnetic waves occur is called ..?

A

Electromagnetic spectrum

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

Radio waves make what vibrate?

A

Electrons

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

What is used in magnetic resonance imaging to help map body tissues?

A

X-rays

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

What is absorbed by the ozone layer?

A

Ultraviolet waves

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

Radio waves with wavelengths of less than 1mm are what?

A

Microwaves

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

Warmth that you feel from a fire is transmitted to you by?

A

Infrared waves

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

The range of electormagnetic waves that you can detect with your eyes?

A

Visible light

27
Q

What are two uses for a GPS?

A

Navigational and determining your exact location

28
Q

Why is satellite telephone service best for one-way communication?

A

If the satellite telephone were a two way then there would be delays, caused by large distances the signals traveled.

29
Q

Coherent light

A

Device that reads intensities of reflected light and converts the info to digital signals

30
Q

Filter

A

Transparent material that selectively transmits light

31
Q

Fluorescent light

A

Light generated by using phosphorus to convert ultraviolet light to visible light

32
Q

Holography

A

Technique that produces a complete three dimensional photographic image of an image

33
Q

Incandescent light

A

Light that is produced by heating a piece of metal

34
Q

Incoherent light

A

Light that can contain more than one wavelength, travel in more than one direction

35
Q

Index of refraction

A

Property of a material indicating how much the speed of light is reduced in the material compared to its papered In a vacuum

36
Q

Linearly polarized light

A

Light whose magnetic field vibrates in only one direction

37
Q

Mirage

A

Image of a distant object produced by refraction of light through air layers of different densities

38
Q

Opaque

A

Material that absorbs or reflects light, and doesn’t transmit any though it

39
Q

Optical scanner

A

Device that reads intensities of reflected light and convert the info to digital signals

40
Q

Pigment

A

Colored material used to change the color of other substances

41
Q

Total infernal reflection

A

The complete reflection of light at a boundary that occurs when light strikes an angle greater than the critical angle

42
Q

Translucent

A

Material that transmits/scatters light, produces blurry images

43
Q

Transparent

A

Material that transmits light without scattering the light waves

44
Q

Why are polarized sunglasses popular among people who like to fish?

A

When the light is reflected some of it is polarized with the magnetic filed vibrating vertically and block the reflected light, reducing the glare

45
Q

Why are optical fibers often called light pipes?

A

Because they act as small pipes that allow ligh to pass through them

46
Q

Why are sunsets and sunrises sometimes red?

A

The red cone in your eye adjusts to what it sees, and that is the colors red and yellow

47
Q

Name four different types of light?

A

Coherent, incandescent, incoherent, and fluorescent

48
Q

What is a polarizing filter?

A

A special filter with lines of crystals that Act as a group of parallel slits

49
Q

Plane mirror

A

Flat smooth surface that reflects light to form upright, virtual images

50
Q

Virtual image

A

An image formed by diverging light rays that is perceived by the brain, even though the images do not actually originate form where they are being projected

51
Q

Concave mirror

A

A reflective surface that curves inward, and can magnify objects or create real images

52
Q

Optical axis

A

Imaginary straight line that is perpendicular to the surface at the center of a mirror or light

53
Q

Focal point

A

Location on the optical axis of ad curved mirror or lens where light rays that are initially parallel to the optical axis converge after they strike the mirror or lens

54
Q

Focal length

A

Distance from the center of a lens or mirror to the focal point

55
Q

Real image

A

An image that appears at a certain location as a result of rays of light converging at that location

56
Q

Convex mirror

A

A reflective surface that curves outward, away from the viewer, and forms a reduced upright virtual image

57
Q

Concave lens

A

A lens that is thicker in the middle than on the edges

58
Q

Concave lens

A

A lens that is thicker on the edges than in the middle

59
Q

Cornea

A

Transparent outer layer covering of the eye ball

60
Q

Retina

A

Inner lining of the eye that has cells

61
Q

Refracting telescope

A

Uses lenses to gather and focus light form distant objects

62
Q

Reflecting telescope

A

Uses mirrors and lenses to collect and focus light from distant objects

63
Q

Microscope

A

Instrument that uses two or more convex lenses

64
Q

Converging rays

A

Light rays that move closer together as they travel

65
Q

Diverging rays

A

Light rays that move apart from each other as they travel

66
Q

What are the highest to lowest types of waves?

A

Gamma rays, X-ray, ultraviolet waves, visible light, infrared waves, microwaves, and radio waves