Physics Optics Chapter 11 Test Flashcards
1
Q
What is light
A
Light is an electromagnetic wave that can be detected by the human eye. Light is energy.
2
Q
What is a Medium
A
any physical substance through which energy can be transferred
3
Q
What is an electromagnetic wave?
A
A wave with both electric and magnetic parts that does not require a medium to transmit
4
Q
What is a wave
A
A wave is a disturbance that transfers energy from one point to another without transferring matter
5
Q
What is the electromagnetic spectrum?
A
The term used by scientists to describe the entire range of light that exists
6
Q
What is white light
A
All colours of light in the visible light spectrum
7
Q
What are radio waves used for
A
- AM/FM signals
- TV Signals
- Cellphone communication
- Radar
- Astronomy (ie discovery of pulsars)
8
Q
What are microwaves used for?
A
- Telecommunications
- Microwave Ovens
- Astronomy (associated w the Big Bang )
9
Q
What is infrared light used for?
A
- remote controls
- lasers
- heat detection
- keeps food warm
- Astronomy (discovering chemical composition of celestial bodies)
- Physio
10
Q
What is visible light used for?
A
- human vision
- theatre/concert lighting
- rainbows
- visible lasers
- astronomy (ex optical telescopes
11
Q
What is ultraviolet light used for?
A
- tan and sunburn
- Increases the risk of developing skin cancer
- production of vitamin D
- “Black lights”
- ultraviolet lasers
- Astronomy (discovering chemical composition)
12
Q
What are X-Rays used for
A
- Medical imaging
- Security equipment
- Cancer treatment
- Astronomy (study of star systems, black holes and centres of galaxies)
13
Q
What are gamma rays used for?
A
- Cancer treatment
- Astronomy (study of nuclear porcesses)
- is Product of a some nuclear decay
14
Q
What does Luminous mean?
A
Something that produces its own light
15
Q
Source of light: Incandescence
A
- The production of light as a result of a high temperature
Ex: Flame on a candle
16
Q
Source of light: Electric Discharge
A
- The process of of producing light by passing an electric current through a gas
17
Q
Source of Light: Phosphorescence
A
- Producing light light by the absorption of ultraviolet light and slowly releasing visible light at a lower energy. Over an extended period of time (Glow in the dark)
18
Q
Source of light: Flouresence
A
- The immediate emission of visible light as a result of the absorption of ultraviolet light.
- When objects absorb ultraviolet light and immediately release the energy as visible like (ex fluorescent light bulbs, highlighter)
19
Q
Source of Light: Chemiluminescence
A
A chemical reaction that directly produces light with little to no heat produced (glow sticks )
20
Q
Source of Light: Bioluminescence
A
When living organisms produce light inside themselves as the result of a chemical reaction with little to no heat produced
21
Q
Source of light: Triboluminescence
A
The production of light from the friction of certain crystals when theyre being scratched, rubbed together, or broken
22
Q
Source of light: Light-Emmiting Diodes (Led)
A
Led is light production as a result of an electric current flowing in semi-conducters
23
Q
What is a visible spectrum?
A
The continuous sequence of colours that make up white lights
24
Q
What does non luminous mean?
A
Objects that do not produce their own light
25
What is a semi-conductor
A material that allows electric current to flow in only one direction
26
What is a light ray
A line on a diagram representing the direction and a path that light is travelling
27
geometric optics?
The use of light rays to determine how light behaves when it strikes objects
28
Incident light
Light emitted from a source that strikes object
29
Transparent
When a material is clear, it transmits all or almost all incident light rays
30
Transluscent
When a material transmits some incident light but absorbs and reflects the rest. Objects are seen but not clearly seen through the material
31
Opaque
The object does not transmit any incident light, is either absorbed or reflected. Objects behind the mirror cannot be seen at all
32
image
The reproduction of an object through the use of light
33
Mirror
Any polished surface reflecting an image
34
Plane
Flat
35
Incident Ray
The incoming ray of light that strikes a surface
36
reflected ray
The ray that bounces off a reflective surface
37
Normal
The perpendicular 90 degree angle to a mirror surface
38
Perpendicular
“At right angles”
39
Angle of reflection
The angle between the reflected ray and the Norma,
40
Specular reflection
Reflection of something off a smooth, flat surface
41
Diffuse Reflection
Reflection of light off an irregular or dull surface
42
Virtual image
And image formed by light coming from an apparent source, light that is not arriving at or coming from the actual image location
43
Concave (converging) mirror
A mirror shaped like part of the surface of a sphere in which the inner surface is reflective
44
Convex (diverging) mirror
A mirror shaped like that part of the surface of a sphere in which the outer surface is reflective
45
Principle axis
The line through the Center of curvature to the midpoint of mirror
46
Vertex
The point where the principal axis meets the mirror
47
Real image
An image that can be seen on a screen as a result of light days actually arriving at the image locatiom
48
Diverge
To spread apart
49
Converge
To move to one point, to connect
50
Name all types of waves
Radio waves,
Micro waves,
Infrared light waves,
Visible light,
Ultraviolet light waves, X-rays,
Gamma rays waves
51
Name all types of waves from lowest to highest energy levels
Radio waves,
Micro waves,
Infrared light waves,
Visible light,
Ultraviolet light waves, X-rays,
Gamma rays waves
52
Name all wave types from highest to lowest frequency
Gamma rays,
X-rays,
Ultraviolet light,
Visible light,
Infared light,
Micro waves,
Radio waves
53
What are the two laws of reflection?
- Angle of reflection = angle of incidence
- Angle of incidence = angle of reflection
- The incident ray, the reflected ray, and the normal to the surface of the mirror, all lie in the same plane
54
If the angle between the reflected ray and the normal is 47 degrees, what is the angle of incidence?
47 degrees
55
If the angle between the incident ray and the normal is 52 degrees what is the angle of reflection?
52 degrees
56
If the angle between the incident ray and plane mirror is 14 degrees what is the angle of incidence and reflection?
76 degrees
57
If the incident ray comes along the normal what is the angle of reflection and incidence?
0 degrees
58
What is radiation
a method of energy transfer that does not require a medium the energy travels at the speed of light
59
What is visible light?
Electromagnetic waves that the human eye can see
60
What is the Visible spectrum
The continous sequence of colours that make up white light
61
Non luminous
An object that doesnet produce its own light
62
Semi-conductor
A material that only allows an electric current to flow in one direction
63
Light ray
A line on a diagram representing the direction and path that light is travelling
64
Geometric optics
The use of light rays to determine how light behaves when it strikes objects
65
Incident light
Light emmited from a source that strikes object
66
Transparent
A clear objet that allows almost all incident light to pass through it
67
Transluscent
An object that transmits some incident light but absorbs and reflects the rest. this is semi-see through
68
opaque
this object only absorbs and reflects light, you cannot see anything behind the material
69
Image
reproduction of an object through the use of light
70
Mirror
any polished surface reflecting an image
71
Reflection
the bouncing back of light from a surface
72
Plane
flat
73
Incident ray
an incoming lightray that strikes a surface
74
Reflected ray
a ray that bounces off a reflective surface
75
Normal
The perpendicular 90 degree angle to a mirror surface
76
Perpendicular
At right angles
77
Specular refelction
The reflection of light off a smooth, flat, shiny surface
78
Diffuse reflection
the reflection of light off a irregular or dull surface
79
Virtual image
an image formed by a light coming from an apperent light source; light that is not arriving or coming from the actual image location
images that are formed in locations where light does not actually reach.
80
Concave (converging) mirror
A mirror shaped like the part of the surface of the sphere in which the inner surface is reflective
81
Convex (diverging) mirror
A mirror shaped like the part of the surface of the sphere in which the outer surface is reflective
82
Centre of curvature
the centre of the sphere whose surface has been used to make the mirror
83
Principal axis
the line through the Center of curvature to the midpoint of the mirror
84
Vertex
The point where the principal axis meets the mirror
85
Real image
an image that can be seen on a screen as a result of light rays actually arriving at an image location
86
Diverge
to spread apart
87
Converge
lines that tend to merge together and meet at a point
88
Name the wave types in order from lowest to highest energy
- radio waves
- microwaves
- Infared light
- visible light
- ultraviolet light
- X-rays
- gamma rays
89
Name the wave types in order from lowest to highest frequency
- radio waves
- microwaves
- Infared light
- visible light
- ultraviolet light
- X-Rays
- Gamma Rays
90
What is the highest part of the wave called
Crest
91
What is the lowest part of the wave called?
Trough
92
What is amplitude
The height of the wave
93
ROYGBIV
Red, orange, yellow, green, blue, indigo, violet
