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1
These waves travel through the interior of the Earth
body waves
2
types of em waves: ✅
✅
3
This law quantifies the emf produced in the conductor
Faraday’s second law
4
This are compressional waves that are longitudinal in nature
primary
5
Types of waves:
transverse, longitudinal, mechanical, seismic, body, em, surface
6
We measure to the crest instead of the trough because then the amplitude is a positive number: ✅❌
✅
7
A changing magnetic field creates a changing electric field: ✅❌
✅
8
The time that it takes a complete cycle or wave oscillation to occur
period
9
Distance between identical points on consecutive waves
wavelength
10
It is represented by T with second (s) as the unit of measure
period
11
He showed that waves travel at the speed of light
Heinrich Hertz
12
It states that electric field can produce a magnetic field, and a magnetic field can produce an electric field
circularity
13
These are waves which require medium for their propagation
mechanical waves
14
Waves in which particles of waves moving parallel to the direction of the propagation of waves
longitudinal waves
15
He is most commonly known for inventing frequency-modulated or FM radio in ______
Edwin Armstrong, 1933
16
Any moving electric charge is surrounded by an electric field and a magnetic field: ✅❌
✅
17
waves travel along the Earth's surface
surface waves
18
Properties of em waves: ✅
✅
19
He did the first all-electronic television broadcast only at the age of 15
Philo T. Fansworth
20
The highest point in a wave
crest
21
He had 700 patents in the United States and Europe that covered every aspect of science and technology
Nikola Tesla
22
Distance between origin and crest (or trough)
amplitude
23
It is the difference in height between the crest and the resting position
wave amplitude of a transverse wave
24
The speed at which the wave moves through the medium
wave speed
25
It is the maximum distance particles move from their resting positions when the medium is compressed by the wave
wave amplitude of a longitudinal wave
26
In a longitudinal wave, particles of the medium move back and forth in the same direction as the wave: ✅❌
✅
27
He had the first transatlantic morse code transmission from England to to Newfoundland through EM waves
Guglielmo Marconi
28
The higher the crests are, the greater the amplitude of the wave
crest
29
It improved the audio signal of radio by controlling the noise static caused by electrical equipment and the earth's atmosphere
fm radio
30
It is the transfer of energy and momentum from one point of the medium to another point of the medium without actual transport of matter between two points
wave motion
31
It is some sort of periodic displacement of an elastic medium from its normal position
wave motion
32
This waves are those which the particles of the medium move parallel to the propagation of the wave
longitudinal waves
33
Also called ground roll, are surface waves that travel as ripples with motions that are similar to those of waves on the surface of water
rayleigh waves
34
characteristics of waves: ✅
✅
35
He was the first person to solve the problem of coordinating electronically scanned television cameras and electronically scanned television receivers that produced 26 clear moving images
Philo T. Fansworth
36
Place the fingers of your right hand along the direction of E and curl your fingers in the direction of B. Your thumb then points along direction
hand rule
37
mechanisms of em waves: ✅
✅
38
He was a genius whose discoveries had a pivotal role in advancing us into the modern era
Nikola Tesla
39
It is the maximum displacement
amplitude
40
The maximum distance that the particles of a waves medium vibrate from their rest position
amplitude
41
fundamental properties of em waves: ✅
✅
42
This are shear waves that are transverse in nature
secondary
43
It is the highest point particles of the medium reach
crest
44
This law states that magnetic field in space around an electric current is proportional to the electric current which serves as its source, just as the electric field in space is proportional to the charge which serves as its source
Ampere’s law
45
This waves are those in which the particles of the medium move perpendicular to the direction of the propagation of the wave
transverse waves
46
wavelength x frequency
speed
47
Two types of particle motion result in two types of body waves:
primary, secondary
48
These are waves that are created as a result of vibrations between an electric field and a magnetic field
electromagnetic waves
49
This law describes the induction of emf in a conductor
Faraday’s first law
50
The number of cycles or vibrations per unit of time
frequency
51
In the main coil changing electric current produces av changing magnetic field. Which then creates a changing electric field in another coil producing an electric current: ✅❌
✅
52
The number of waves produced in a given amount of time
frequency
53
The lowest point in a wave
trough
54
Speed of light: ✅
✅
55
It is regarded as a flow of energy from a vibrating electric and magnetic field
wave
56
Em waves are also referred to as
electromagnetic radiation
57
His most notable achievements include the first audio radio transmission in 1900 The first two-way transatlantic transmission in 1900 and the first broadcast of entertainment in in 1906
Reginald Fessenden
58
These waves have areas of compression and areas of rarefaction
longitudinal waves
59
In _____, he transmitted recognizable electronic signals from his family home to a vertical raised antenna more than a mile away
1895, Guglielmo Marconi
60
This law states that for any closed loop path, the sum of the length elements times the magnetic field in the direction of the length element is equal to the permeability times) the electric current enclosed in the loop
Ampere’s law
61
It is the point half way in between a crest and a trough in the vertical direction
equilibrium
62
He theorized that waves travel at the speed of light
James Clerk Maxwell
63
These waves are horizontally polarized shear waves, existing only in the presence of a semi-infinite medium overlain by an upper layer of finite thickness
love waves
64
He demonstrated the generation and detection of radio waves in ________
Heinrich Hertz, 1887
65
In ______, he was the first to recognize that the equations of electromagnetism lead to the existence of electromagnetic waves
1865, James Clerk Maxwell
66
The basic equations of electricity and magnetism are known as
Maxwell’s equations
67
In ________, particles of the medium move up and down at right angles to the direction of the wave
transverse waves
68
It is the speed which the disturbance propagates through the medium
velocity
69
These are waves of energy that travel through Earth's layers
seismic waves
70
the greatest physics discovery of the 19th century
electromagnetic waves
71
It is the distance from any point on a wave to an identical point on the next wave
wavelength
72
Number of waves that pass a point per unit time
frequency
73
Waves in which particles move perpendicular to the direction of the propagation of waves
transverse waves