Download presentation

Presentation is loading. Please wait.

Published byDomenic Short Modified over 4 years ago

1
Describe a Wave

2
Chapter 14 Waves & Energy Transfer

3
Wave A rhythmic disturbance that carries energy through matter

4
Wave Pulse A single bump or disturbance that travels through a medium

5
Continuous Wave The rhythmic disturbance that travels through a medium

6
Types of Waves

7
Transverse Wave A wave that vibrates perpendicular to the wave motion

8
Transverse Wave A good representation would be a sine wave

9
Longitudinal Wave A wave that vibrates parallel to the wave motion

10
Longitudinal Wave A good representation would be a slinky

11
Surface Wave A wave that travels on the border of two mediums

12
Surface Wave Have both transverse & longitudinal characteristics

13
Surface Wave Good examples are swells or surface water waves

14
Mechanical Waves Waves that require a medium

15
Electromagnetic Waves Waves that do not require a medium

16
Ray A vector representing the wave & its direction

17
Measuring Waves

18
Wave Speed How fast a wave is moving through a medium

19
Wave Speed v = d/ t

20
Wave Speed Measured in m/s

21
Wave Speed All waves move at a constant speed in a given medium

22
Crest Trough Amplitude Wavelength ( )

23
The distance between corresponding points in a wave

24
Wavelength ( ) Measured in m or some form of m

25
Displacement The perpendicular distance a wave vibrates from zero

26
Amplitude The maximum displacement a wave vibrates from zero

27
Frequency (f)( ) The number of waves per unit time

28
Frequency Measured in hertz (Hz) (cycles/s or waves/s)

29
Period (T) The time measured in (s) for one wave to pass or the time for one cycle

30
Frequency Period Formula T = 1/f

31
Wave Velocity Formula v = f

32
You are 525 m from a clock tower. You hear a clock’s chime at 436 Hz in 1.50 s. Calculate: v, T, & of the sound wave

33
You shout towards a wall 0.685 km away producing a 75 cm wave. You hear the echo in 4.00 s. Calculate: v, T, & f

34
Surface Waves At wave boundaries exhibiting both transverse & longitudinal properties

35
Wave Speed All waves move at a constant speed in a given medium

36
Waves passing from one medium to another

37
Incident Wave The waves that strikes a boundary of a given medium

38
Reflected Wave The waves that bounces off the boundary & returns

39
Transmitted Wave The waves that passes from one medium to another

40
Wave Behavior When waves pass from one medium to another they are both transmitted & reflected

41
Radio waves travel at 3.00 x 10 8 m/s. Calculate the wavelength of your favorite radio station.

42
Wave Behavior Waves transmitted from one medium to another stay in phase or do not invert

43
Wave Behavior The amplitude change in both transmitted waves & reflected waves is dependent on % transmitted

44
Wave Behavior When colliding with a more dense medium, reflected waves invert

45
Wave Behavior When colliding with a less dense medium, reflected waves stay erect or in phase

46
Wave Behavior When waves pass from one medium to another of, the frequency remains constant

47
Wave Behavior When waves pass from one medium to another of different density, the speed changes

48
Wave Behavior The speed of longitudinal waves is proportional to the density of the medium

49
Wave Behavior The speed of transverse waves is inversely proportioned to the density of the medium

50
Wave Behavior v = f, thus is inversely proportioned to f

51
A tsunami is formed 1800 km away producing a 60 ft tidal wave that strikes shore 3.0 hr later. Calculate: v wave in m/s

52
Interference The effect of two or more waves passing through a medium simultaneously

53
Principle of Superposition At the point where 2 or more waves meet, the total displacement is the sum of all the individual displacements

54
Constructive Interference When the interference of waves is crest to crest

55
Constructive Interference Will result in waves of larger amplitude

56
Destructive Interference When the interference of waves is crest to trough

57
Destructive Interference Will result in waves of smaller amplitude

58
Node A point in a medium that goes through no displacement when waves pass through each other

59
Node A point in a medium that goes through no displacement when waves pass through each other

60
Antinode A point in a medium that goes through maximum displacement when waves pass through each other

61
Standing Wave The result of identical waves moving in opposite directions

62
Standing Wave A guitar string is a good example

63
Waves in Two Dimensions

64
Reflected Wave When a wave bounces off a wave boundary

65
Law of Reflection When a wave strikes a boundary at an angle other than normal, the reflected angle equal the angle of incident

66
Law of Reflection reflection = incident

67
Refraction When a wave strikes a boundary at an angle other than normal, the angle of the transmitted ray is changed

68
Refraction The bending of waves passing from one medium to another due to speed change

69
Less Dense Medium More Dense Medium Normal

70
Diffraction The bending of waves around a barrier

71
Diffraction When a wave passes through a small opening, the wave will exit in a semi-circular pattern

73
Three waves (1.0 m, 0.60 m, & 0.50 m) pass simultaneously through a medium. Calculate maximum & minimum displacement:

74
Red light with a wavelength of 600.0 nm travels through space at 3.00 x 10 8 m/s. Calculate its: frequency & period

75
A 60.0 Hz note from a base guitar travels through a hot room at 360 m/s. Calculate its: wavelength & period

76
A series of 6.0 ft waves move towards an island. Determine the side of the island where the waves will be the largest. Front of back

77
Three waves (2.0 m, 1.5 m, & 1.2 m) pass simultaneously through a medium. Calculate maximum & minimum displacement:

78
Blue light with a wavelength of 450 nm travels through space at 3.00 x 10 8 m/s. Calculate its: frequency & period

79
An 85 Hz note from a bass guitar travels through a room at 340 m/s. Calculate its: wavelength & period

80
Island Phenomenon

81
Answer the questions on page 268 & 269, and work problems a on page 269.

Similar presentations

© 2019 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google