Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics > Waves - Basics - Chapter 15 > Flashcards

Waves - Basics - Chapter 15 Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
0
Q

What is a progressive wave?

A

A wave that carries energy from one place to another.

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

What is the position that an oscillation vibrates about?

A

The equilibrium position or mean position.

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

What is a mechanical wave?

A

A wave that travels through a medium.

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

SUD of wavelength?

A

S - lambda
U - m
D - the distance between two adjacent points that are in phase.

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

SUD of period?

A

S - T
U - s
D - time taken for one complete oscillation of a point in a wave.o

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

SUD of frequency?

A

S - f
U - Hz (seconds power -1)
D - the number of oscillations of a particle per unit time.

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

SUD of displacement?

A

S - x bar (mean of x)
U - m
D - distance of any part of the wave from the mean position (can be + or -).

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

SUD of amplitude?

A

S - A
U - m
D - the maximum displacement of a wave from it’s mean position (positive only).

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

SUD of phase difference?

A

S - O with a line through it
U - rad
D - the fraction of a cycle between the oscillations of two particles, expressed in degrees.

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

Define intensity?

A

The power transmitted normally through a surface per unit area.

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

Intensity equation?

A

I = power/unit area
(w/m2) = (W)/(m2)
I is proportional to the square of the amplitude (inverse square law).

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

What is a pure wave?

A

Smooth wave, no jagged edges.

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

What is a regular wave?

A

Set wavelength and set amplitude.

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

Power = ?

A

E(J) / t(s).

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

Examples of transverse waves?

A

Water waves, s-waves, EM waves.

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

What is a transverse wave?

A

A wave where the displacement is perpendicular to the direction of the wave.

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

What is a longitudinal wave?

A

A wave where the displacement is parallel to the direction of the wave (pressure waves).

17
Q

Examples of a longitudinal wave?

A

Sound waves, p-waves, wind instrument.

18
Q

What is an impure wave?

A

A wave with jagged edges.

19
Q

What is an irregular wave?

A

A wave with a random line (unpredictable amplitude and wavelength).

20
Q

When measuring phase difference, what is 360 degrees?

A

2pi radians

21
Q

What is 180degrees when measuring phase difference?

A

1pi radians

22
Q

Speed of a wave = ?

A

Frequency (1/time) x wavelength

f x lambda

23
Q

What is path difference?

A

The difference in the distances travelled by two waves from coherent sources at a particular point.

24
Q

Define refraction?

A

The change in direction of a wave as it crosses an interface between two materials where it’s speed changes. Frequency doesn’t change!

25
Q

Intensity equation 2?

A

Intensity=

Power / cross sectional area

26
Q

What is speed of propagation, and if it changes how is this shown on a displacement position graph?

A

It is the speed at which a wavefront passes through a medium, relative to the speed of light.
It will not affect a displacement position graph?

27
Q

Define diffraction?

A

The spreading of a wave when it passes through a gap or past the edge of an object.

27
Q

Define reflection?

A

The bouncing back of a wave from a surface.

28
Q

Define coherent?

A

Two sources are coherent when they emit waves with a constant phase difference.

29
Q

Define antinode?

A

A point on a stationary wave with maximum amplitude.

30
Q

Define dispersion?

A

The splitting of light into its different wavelengths.

31
Q

Define electromagnetic spectrum?

A

A family of waves that travel through a vacuum at a speed of 3.0x10^8 m/s.

32
Q

Define power?

A

The rate at which energy is transferred or the rate at which work is done.

33
Q

Define rarefaction?

A

A region in a sound wave where the air pressure is less than the mean value.

34
Q

Define wave?

A

A periodic disturbance travelling through space, characterised by vibrating particles.

35
Q

How are water waves refracted?

A

Water waves are refracted when the depth of the water changes. Shallower water means the waves travel slower than deeper water.

36
Q

Page 165?

A

Diagram on reflection.

37
Q

How high frequencies can the human ear detect?

A

20Hz to 20kHz

38
Q

Angle of reflection =

A

Angle of incidence

Physics (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions