Waves Flashcards
(135 cards)
1
Q
Aerial
A
a long wire that produces radio waves when an oscillating current is passed down it
2
Q
Angle of Incident
A
the angle at which the incident ray hits the normal
3
Q
Angle of Reflection
A
the angle at which the reflected ray leaves the normal
4
Q
Antihelix
A
curved visible part of the ear
5
Q
Antitragus
A
small notch just above the lobule
6
Q
Anvil
A
small ear in your bone that vibrates to allow you to hear
7
Q
Aperture Stop
A
physically limits the solid angle of rays passing through the system from an on-axis object, in other words, limits the brightness
8
Q
Auditory Nerve
A
nerve that allows you to hear
9
Q
Auditory Ossicles
A
group of small bones in the ear that vibrate to allow you to hear
10
Q
Black
A
where nothing is reflected and everything is absorbed
11
Q
Black Filter
A
where all light is absorbed and nothing is reflected
12
Q
Blue Filter
A
where blue light is transmitted and red and green are absorbed
13
Q
Bluetooth
A
a use for radio waves that connects a computer to peripheral devices
14
Q
Cartilage
A
holds shape of the ear
15
Q
CCD
A
Charge-Coupled Device
sensors that convert x-rays to light, creating electronic signals in the sensors that are sent to a computer which displays a digital x-ray image
16
Q
Cilla
A
small hairs in the middle air that waft mucous away
17
Q
Cochlea
A
converts auditory signals to neural impulses
18
Q
Cochlea Nerve
A
another word for auditory nerve
19
Q
Cochlear Implant
A
20
Q
Compression
A
area where longitudinal waves are closer together
21
Q
CAT Scans
A
Computerised Axial-Tomography Scans
multiple x-rays used to build up a 3D model with more details shown than a normal x-ray that can differentiate between soft tissues, but uses a higher dose of radiation than a normal x-ray
22
Q
Cosmic Radiation
A
radiation from space
23
Q
Crust
A
outer layer of the Earth, solid
24
Q
Continental Crust
A
thick (10-70km) less dense and older than oceanic crust
25
Oceanic Crust
thin (7km), young, dense, so sinks under the continental crust
26
Crystallography
where x-rays are used to see inside crystals
27
Cyan
blue and green light
28
Cyan Light
where red and blue light is transmitted and green is absorbed
29
Diffuse
reflection from a rough surface
30
Diffuse Reflection
reflection off rough surfaces that you can't see a reflection in
31
Distress Signal
use for visible light
32
Dobson Units
units for measuring the amount of ozone
33
Ear Canal
pathway from outer ear to eardrum
34
Ear Drum
thin membrane that is vibrated by sound waves
35
Ear Wax
protects the ear by trapping dirt and fighting infections
36
Echolocation
a method that bats, dolphins and blind people use for location
37
Electromagnetic Waves
waves which do not need a medium, eg light
38
Endoscope
contains two bundles of fibres that transmit light into a body cavity for medical examination
39
Epi-Centre
where an earthquake originates from
40
Eustachian Tube
a hollow tube from the ears to the tube that is lined with hair-like projections that sweep mucus away from the middle ear
41
External Auditory Meatus
another word for ear canal
42
Filter
something that transmits only one colour of light
43
Focal Length
the distance between the lens to the principal focus
44
Green Filter
where green light is transmitted and red and blue are absorbed
45
Hammer
small bone in the ear that vibrates to allow you to hear
46
Helix
part of the ear not visible from the outside
47
Impure Note
a note with inconsistent amplitude and frequency
48
Incident Rays
original rays
49
Incus
another name for anvil, the bone moved by the hammer
50
Infared
wavelength beyond red that we can’t see, refracted less than red and its wavelength is longer
51
Inner Core
innermost layer of the Earth, solid
52
Ionosphere
layer of atmosphere that reflects radio waves
53
Lateral Inversion
reversal of right and left
54
Law of Reflection
the angle of reflection equals the angle of incidence
55
Lead
a good absorber of radiation
56
Lead Absorber Plates
put between the patient and the x-ray tube to stop x-rays reaching other parts of the body
57
Lighthouse
use for visible light
58
Lobule
scientific word for earlobe, helps to warm the ears and maintian balance
59
Longitudinal Wave
waves where the vibrations are parallel to the direction of energy transfer
60
L-Waves
Love Waves
a combination between P-Waves and S-Waves that travel along the surface of the Earth and cause the most destruction, the slowest form of wave
61
Magenta
blue and red light
62
Magenta Filter
where red and blue light is transmitted and green is absorbed
63
Malleus
another word for hammer, the bone that moves when the ear drum vibrates
64
Mantle
second layer of the Earth, semi-solid
65
Mechanical Wave
waves that need a medium eg sound waves, water waves
66
Mobile Phones
a use for microwaves
67
Monochromatic
light like that emitted by lasers and neon lamps that has one wavelength of colour
68
Negative Image
the image on the film from an x-ray
69
Normal
the point at which incident rays are reflected and become reflected rays
70
Opaque
things that you can't see through
71
Optical Fibres
fibres that light can be passed down, used in endoscopies and colonscopies
72
Oscillating
something that is vibrating
73
Oscillation
repetitive vibrations
74
Outer Crust
third layer of the Earth, liquid
75
Outer Ear
the external part of the ear that directs sound waves
76
Oval Window
one of two openings between the middle ear and the outer ear
77
Ozone
a layer of the atmosphere that absorbs ultraviolet rays from the sun
78
Peak
the top of a wave
79
Perfect Black Body
an object that absorbs all of the radiation incident on it, does not reflect or transmit any radiation, since a good absorber is also a good emitter, a perfect black body is the best possible emitter
80
Pinna
another word for outer ear
81
Pixels
light-sensitive cells in digital camera
82
Primary Colours of Light
red, green and blue
83
Pure Note
a note with constant frequency and amplitude
84
P-Waves
Primary Waves
longitudinal seismic waves that can travel through solids and liquids faster than S-Waves
85
Radar
a use for radio waves
86
Radiograph
an image produced on a sensitive plate or film by X-rays, gamma rays, or similar radiation, and typically used in medical examination
87
Radon Gas
gas that seeps through the earth from deep underground
88
Ray Diagram
diagrams used to show rays and how they are reflected
89
Real Image
one that is formed by focusing the light rays at a point, can be projected onto a screen
90
Red Filter
where red light is transmitted and blue and green are absorbed
91
Reflected Rays
rays that are reflected
92
Remote Controls
use for infared waves
93
Richter Scale
scale used to measure seismic waves
94
Ripple Tank
a specialised form of wave tank used for demonstrating basic properties of waves
95
Round Wave
one of two openings between the middle and outer ear
96
Sat Nav
a use for microwaves
97
Secondary Colours of Lights
cyan, yellow and magenta
98
Seismic Waves
waves created by earthquakes and volcano eruptions
99
Seismologist
scientists who study seismic waves
100
Seismology
study of seismic waves
101
Seismometer
device used to detect seismic waves
102
Semicircular Canals
three fluid-filled channels in the ear that help maintian balance
103
Shadow Zone
area where no seismic waves can be detected
104
Sky TV
a use for radio waves
105
Sonar
a pulse of ultrasound used to locate things
106
Specular Reflection
reflection off smooth surfaces that you can see a reflection in
107
Speed of Sound
330 m/s
108
Stem
another word for antihelix
109
Stirrup
small bone in the ear that vibrates to allow you to hear
110
S-Waves
Secondary Waves
transverse seismic waves that can only travel through solids, stands for Secondary Waves
111
Tragus
projection of the outer ear
112
Translucent
things that you can partially see through
113
Transmission
the movement of light through a material
114
Transparent
things that you can see through
115
Transverse Wave
waves where the vibrations are perpendicular to the direction of energy transfer
116
Trough
the bottom of a wave
117
Tympanic Cavity
another word for middle ear
118
Tympanic Membrane
another word for eardrum
119
Ultrasound
sound above the maximum frequency that humans can hear, 20000Hz
120
Ultraviolet
wavelength beyond purple that we can't see, it is refracted more than violet and its wavelength is shorter
121
Undisturbed Position
midpoint between peak and trough
122
Vestibular Nerve
branches of the ventrobulocochlear nerves
123
Ventrobulocochlear Nerve
conveying sensory impulses from the organs of hearing and balance in the inner ear to the brain
124
Vibrations
a constant repeated up and down or back and forth motion
125
Virtual Image
one that is formed by focusing the light rays at a point, can be projected onto a screen
126
Visible Spectrum
consists of all the light we fan see: red, orange , yellow, green, blue, indigo, violet. Red is the longest wavelength and is refracted the least, whereas violet is the shortest wavelength is and is refracted the most
127
Wave
a series of disturbances that are the same distance from each other and transfer energy from one place to another
128
Wave Speed
the speed at which the energy is transferred, or the waves moves, through the medium, measured in metres per second, m/s
129
White
where everything is reflected and nothing is absorbed
130
White Filter
where all light is reflected and nothing is absorbed
131
White Light
light from ordinary lamps and the Sun
132
X-Ray Therapy
used to destroy cancerous cells in the body
133
X-Ray Tube
produces X rays by accelerating electrons to a high velocity with a high-voltage field and causing them to collide with a targe
134
Yellow
red and green light
135
Yellow Filter
where red and green light is transmitted and blue is absorbed
