Brainscape's Knowledge GenomeTM

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


See full index

Physics > Waves > Flashcards

Waves Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

waves transfer

A

energy from place to place with transferring matter

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

waves can be

A

reflected, refracted and defracted

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

wavelength definition

A

the distance from a point on the wave to the equivalent point on the adjacent wave

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

peak definition

A

top of the wave

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

amplitude definition

A

the maximum displacement of a point on the wave from its undisturbed position

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

trough definition

A

bottom of the wave

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

frequency definition

A

the number of waves passing a fixed point every second

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

time period definition

A

the time taken for each wave to pass a fixed point

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

wave speed definition

A

the distance travelled by each wave every second through a medium

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

wave speed equation

A

frequency x wavelength

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

speed equation

A

distance / time taken

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

reflection definition

A

the change of direction of a light ray when it passes across a boundary between two transparent substances

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

refraction definition

A

the change of direction of a light ray when it passes across a boundary between two transparent substances

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

wavelets move

A

forward together to recreate the wavefront that created them

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

what is the speed of light

A

3 x 10 to the power of 3 m/s

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

angle of incidence and angle of reflection

A

angle of incidence = angle of reflection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

angle of incidence and angle of refraction across air and glass

A

opposite angles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

space is

A

a vacuum meaning no sound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

auditory nerve

A

sends electrical signals to the brain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

ossicles

A

three small bones (hammer, anvil and stirrup)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

eat drum

A

a sheet of muscle and skin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

ear canal

A

eat passage with wax and hair

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

pinna

A

the ear flap

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

semi-circular canals

A

helps to balance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

cochlea

A

coverts vibrations into electrical signals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

ultrasound

A

sound that has a frequency above the range of human hearing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

infrasound

A

sound with a frequency below the range of human hearing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

range of human hearing

A

20hz - 20khz

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

waves are sent

A

toward the foetus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

technology works out

A

the distance between where the wave was set off from to where it hit the foetus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

3 things that can happen when a wave hits a boundary

A

reflect
transmit (refract if at an angle and speed change)
absorbed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

transducer

A

create an ultrasound wave

33
Q

ultrasound will travel

A

through the body and will partially reflect at a boundary between tissues

34
Q

some of the wave will

A

transmit into the next layer of tissue

35
Q

transducer detects

A

reflections as a pulse

36
Q

distance equation

A

speed x time

37
Q

p waves

A

longitudinal wave
‘push-pull’ effect on building causing ‘up-down’ moment
travel through solid + liquid
primary ‘first’ wave

38
Q

s waves

A

transverse waves
‘side to side’ effect on building causing ‘left to right’ movement
only travel through solid
seismic ‘second’ wave

39
Q

dark colour are the

A

best emitters of radiation

40
Q

matte surface is the

A

best emitter if radiation

41
Q

colour spectrum

A

red
orange
yellow
green
blue
indigo
violet

42
Q

speculate reflection

A

smooth surfaces

43
Q

difficult reflection

A

rough surfaces

44
Q

waves for detection and exploration

A

high frequency sound waves can be used to detect objects in deep water and measure water depth

45
Q

electromagnetic waves

A

transverse waves with a wide range of properties and uses

46
Q

infra-red radiation

A

a part of electromagnetic spectrum

47
Q

uses of electromagnetic waves

A

redos waves - television and radio
microwave s- satellite communications and cooking food
infrared - electrical heaters, cooking food and infrared cameras
visible light - fibre optic communications

48
Q

lenses

A

concave and convex lenses

49
Q

visible light

A

the visible region of the electromagnetic spectrum

50
Q

black body radiation

A

name given to the thermal radiation emitted by all bodies (objects)

51
Q

ripple tank required practical

A

measure and calculate frequency, wavelength and the speed of waves on the surface of the water

52
Q

what is a longitudinal wave?

A

is parallel to the direction the wave travels
p-waves
sound waves, ultrasound waves

53
Q

what is a transverse wave?

A

is perpendicular to the direction the wave travels
s-waves
radio waves, light waves

54
Q

period equation

A

period = 1/frequency

55
Q

what is a method used to measure the speed of sound waves in air

A

clap-echo method

This method involves measuring the time taken for you to hear an echo from a sharp clap. You stand a long distance from a wall, clap, and listen for the echo. The distance travelled is twice the distance from you to the wall (because the sound has to travel to the wall and back)

56
Q

what is a method used to measure the speed of ripples on a water surface

A

ripple tank method

A ripple tank is a transparent shallow tray of water with a light shining down through it onto a white card below. The light allows you to see the motion of the ripples created on the water’s surface more easily. Ripples can be made by hand but to generate regular ripples it is better to use a motor

57
Q

how are sound waves formed

A

Sound waves are created by object vibrations and produce pressure waves, for example, a ringing cellphone. The pressure wave disturbs the particles in the surrounding medium, and those particles disturb others next to them, and so on

58
Q

what are ultrasound waves and how are they used to determine how far away a boundary is?

A

sound waves
they pass through softer tissue but reflect denser tissue

59
Q

what are seismic waves and how can they tell us about the earths structure?

A

seismic waves can only travel through solids so they can tell us that the earth has liquid layers

60
Q

what is echo sounding?

A

high frequency sound waves used to detect objects in deep water or measure water depth

61
Q

what are some common properties of electromagnetic waves?

A

all transverse waves
can travel through a vacuum
travel at exactly the same speed in vacuum (speed of light)
transfer energy from one place to another
can be reflected and refracted

62
Q

what are all of the parts of the electromagnetic spectrum?

A

radio waves
micro waves
infra red
visible light
ultraviolet
x-rays
gamma rays

63
Q

how do different substances absorb, transmit, refract or reflect electromagnetic waves?

A
64
Q

how are radio waves sent and received?

A

transmitter radiates electromagnetic waves outwards via an antenna and a receiver picks up the waves and translates them into sounds that can be heard

65
Q

how are gamma waves produced?

A

by charges in the nucleus of an atom

66
Q

what are the dangers of ultraviolet, x-rays and gamma?

A

ultraviolet = sunburn, premature aging, skin cancer
x-ray = cancer many years or decades later
gamma = destroy living cells, produce gene mutations and cause cancer

67
Q

what are the uses of each part of the electromagnetic spectrum?

A

radio = radio and television
microwaves = satellite communications and cooking food
infrared = electrical heaters, cooking food and infrared cameras
visible light = fibre optic communications
ultraviolet =energy efficient lamps, sun tanning
x-rays = medical imaging and treatment
gamma = medical imaging and treatments

68
Q

how do convex lens produce an image?

A

causes rays of light to converge

69
Q

how do concave lens produce an image?

A

causes rays of light to diverge

70
Q

how do you calculate magnification and why does it have no units?

A

using a scaler bar
it has no units as it is a ratio of low lengths

71
Q

what is the difference between specular and diffuse reflection?

A

specular = smooth surfaces like mirrors causes light rays to reflect at the same angle they hit the surface
diffuse = rougher surfaces scatter light rays in different directions

72
Q

how do colour filters work?

A

when white light passes through a coloured filter, all colours are absorbed except for the colour of the filter

73
Q

how does colour link to frequency and wavelength?

A

each colour has a different wavelength and frequency

74
Q

why do objects appear to be a certain colour?

A

they absorb some colours and reflect or transmit other colours

75
Q

what is a black body?

A

the spectrum of light emitted by any heated object e.g. heating of a toaster, filament of a light bulb

76
Q

bodies emitting radiation

A

all bodies emit radiation and the intensity and wavelength distribution of any emission depends on the temperature of the body

77
Q

the body temp and radiation

A

the body at a constant temp absorbs radiation at the same rate as it is emitting radiation. the temperature of a body increases when the body absorbs radiation faster than it emits

78
Q

what factors affect the temperature of the earth?

A

as the earth internal energy increases the surface gets hotter

Physics (9 decks)

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