Waves Flashcards

1
Q

Define a longitudinal wave

A

One in which the particles vibrate parallel the direction in which the wave is travelling

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

Define a transverse wave

A

One in which the particles vibrate perpendicular to the direction in which the wave is travelling

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

Define frequency

A

Frequency in the number of complete waves passing a fixed point in a second.

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

Define wavelength

A

Wavelength is the distance between two consecutive crests or troughs

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

Define amplitude

A

Amplitude is the greatest displacement of the wave from its undisturbed position

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

What is the wave equation?

A

Wave speed = frequency x wavelength
V= f x λ

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

Define reflection

A

Reflection is sending back a wave into the medium from which it came.

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

What is the normal

A

The line perpendicular to the barrier.

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

What is true during reflection

A

The angle of incidence always equals the angle of refraction
The wavelengths of the incident and reflected waves are equal
The frequency of the incident waves is the same as that of reflected waves
There is continuity of incident waves and reflected waves at the barrier

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

Define refraction

A

Refraction is the change in direction of a wave passing from one medium to another caused by its change in speed.

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

What happens to water as it moves from deep to shallow

A

Waves travel more slowly in shallow water. Since the same number of waves leave the deep water as enter shallow water every second the frequencies must be the same, therefore the wavelength in shallow must be shorter.

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

What are applications of ultrasound?

A

Scanning metal faults for cracks
Scanning a women’s womb to check the development of her baby
Scanning soft tissues to diagnose cancer
Fish location by seagoing trawlers
Mapping the surface of the ocean floor in oceanography

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

What is sonar

A

Sound navigation and ranging, developed to detect submarines in the early 20th century.

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

What is radar

A

Radio detection and ranging
Was originally developed in ww2 to detect enemy aircraft. Radar waves are in the microwave section of the electromagnetic spectrum
Radar waves are incredibly fast at 300,000,000 m/s which is why they are used.

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

What properties do electromagnetic waves have?

A

Carry energy
Can be reflected
Can be refracted

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

What are all the types of electromagnetic wave?

A

Gamma rays
X-rays
Ultraviolet light
Visible light
Infrared light
Microwaves
Radio waves