Brainscape's Knowledge GenomeTM

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


See full index

Science > Invisible Waves 9 > Flashcards

Invisible Waves 9 Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is a wave?

A

a transfer of energy that spreads through a medium from the disturbance location, usually as vibrations in the medium

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

What is a transverse wave?

A

a wave that consists of a disturbance occurring perpendicular to the equilibrium

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

What is a longitudinal wave?

A

A wave that consists of a disturbance occurring parallel to the equilibrium

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

What is a pulse wave?

A

A wave that is caused by a single disturbance

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

What is a periodic wave?

A

A wave that is caused by a continuous and repetitive disturbance

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

What is a period?

A

The duration of a single vibration

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

What is sound?

A

A longitudinal wave travelling through a medium which can be detected by the ear

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

What is pitch?

A

The frequency of a sound wave

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

What is an electromagnetic wave?

A

A wave consisting of a vibrating electric field which causes a vibrating magnetic field

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

What is light?

A

Electromagnetic waves that can be detected by the eye

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

What is diffuse reflection?

A

The reflection of light from a surface that scatters the incident rays

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

What is specular reflection?

A

The reflection of light from a surface so that the incident ray is reflected at the same angle

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

What is refraction?

A

The change in direction of a wave passing from one medium to another one where it travels at a different speed

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

What is this?

A

Diffuse reflection

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

What is this?

A

Specular reflection

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

What happens when a pulse wave is reflected?

A

It goes back and forth until it dies out

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

Describe longitudinal wave characteristics

A
  • sounds
  • parallel
  • rarefactions & compressions
  • needs medium
18
Q

Describe transverse wave characteristics

A
  • Electromagnetic radiation
  • Light
  • perpendicular
  • troughs and peaks
  • doesn’t need medium
19
Q

Describe the equation triangle for velocity, wavelength, and frequency

A

V

λ | ƒ

20
Q

Describe the equation triangle for velocity, wavelength, and time (period)

A

λ

V | t

21
Q

What is frequency measured in?

A

Hertz (Hz)

22
Q

What is velocity measured in?

A

m/s

23
Q

What is wavelength measured in?

A

metres (m)

24
Q

What is time measured in?

A

seconds (s)

25
Q

The bigger the amplitude the…

A

louder something is

26
Q

The higher the frequency the…

A

higher the pitch

27
Q

What does the speed of sound depend on?

A

The medium it’s going through

28
Q

Does sound travel faster through air or a solid?

A

solid

29
Q

What is ultrasound?

A

sound above 20,000Hz

30
Q

Describe sound in terms of particles

A

When something vibrates, it hits the particles next to it causing them to vibrate, which then cause the particles next to them to vibrate, and so on until it dies out.

31
Q

Order electromagnetic radiation from highest to lowest frequency

A

gamma rays, X-rays, ultraviolet, visible light, infrared, microwaves, radio waves

32
Q

What does the visible spectrum wavelength range from?

A

700nm (red) to 400nm (violet)

33
Q

Describe the characteristics of AM radio signals

A
  • can get static
  • vary amplitude based on message being sent
  • frequency stays the same
  • long wavelength
  • can bend
34
Q

Describe the characteristics of FM radio signals

A
  • can’t get static
  • vary frequency based on message being sent
  • amplitude stays the same
  • short (3m) wavelength
  • can’t bend
35
Q

What is this?

A

total internal reflection

36
Q

When does total internal reflection happen?

A

When the angle of incidence is bigger than the critical ange

37
Q

What is the critical angle?

A

The angle of incidence when the angle of refraction is at 90 degrees

38
Q

How do you see colour?

A

objects absorb all visible light except they reflect the colour that they are back into your eye

39
Q

What is the equation triangle for speed, time and distance

A

d

s | t

40
Q

What is this?

A

Virtual image

41
Q

What is this?

A

Real image

42
Q

What is the difference between a real and virtual image?

A

Real images

  • can be projected onto a screen
  • distance between image and lens is always closer than the lens and the object

Virtual Image:

  • Cannot be projected onto a screen

Science (13 decks)

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