Brainscape's Knowledge GenomeTM

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


See full index

GCSE CCEA Physics unit 2 And 3 > Waves > Flashcards

Waves Flashcards

You may prefer our related Brainscape-certified flashcards:
GCSE Geography - AQA flashcards Physics 101 flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route A flashcards GCSE Religious Studies - Edexcel Route A flashcards GCSE Religious Studies - Eduqas Route B flashcards AP® Physics flashcards
1
Q

What is the function of a progressive wave?

A

They transfer energy from point A to point B through vibrations

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

What is a longitudinal wave?

Give an example.

A
  • A wave in which the vibrations are parallel to the direction of the wave/wave propegation
  • e.g. sound and ultrasound
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a transverse wave?

Give an example.

A
  • A wave in which the vibrations are perpendicular (at 90º) to the direction of the wave/wave propegation
  • e.g. water waves, electromagnetic waves
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the definition of frequency?

A

The number of complete waves passing a point in 1 second

(Measured in Hertz (Hz or 1/s))

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

What is the definition of wavelength?

A

The distance between two consecutive crests/peaks or troughs (m)

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

What is amplitude?

A

The maximum displacement of the wave from its rest/equilibrium position (m)

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

What is periodic time?

A

The time for one complete wave or vibration

(Measured in seconds (s))

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

What is ultrasound?

A

The sound of a frequency greater than 20000 Hz

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

What is echo?

A

The reflection of a wave by a surface or object so that a weaker version of it is detected shortly after the original

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

What is radar?

A

The use of reflected radio waves to track fast-moving objects e.g. aircraft

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

What is sonar?

A

The use of ultrasound echoes to measure distances and form images e.g. of a unborn baby or seabed

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

What is refraction of waves?

A

The change in direction of a wave due to a change in refraction index

and

its speed changes

(FAST: Faster Away; Slower Towards)

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

What are electromagnetic waves

A

transverse waves which travel at the speed of light (3 x 108m/s) in a vacuum.

In increasing wavelength: Gamma rays; x-rays; ultra-violet; visible; infra-red; microwaves; radio waves

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

What happens when circular waves are reflected from a straight barrier?

A

The waves move with the same wavelength and speed of the wave they are reflecting

The centre point of reflected waves are the same distance from the barrier as the centre point of incident waves

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

How are waves reflected by a parallel barrier?

A

The waves remain straight and keep the same wavelength and speed as the incident waves

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

How are straight waves reflected at a 45º angle from a straight barrier? (2)

A
  • Incident angle = reflected angle (angle from normal to wave)
  • They also have the same wavelength and speed
17
Q

How do waves change when travelling from deep to shallow water? (3)

A
  • wavelength decreases
  • speed decreases
  • Frequency constant
18
Q

What is the equation relating to wave’s wavelength, frequency and velocity?

Give units

A

v = fλ

Velocity = frequency x wavelength

Velocity = m/s
Frequency = Hz / S-1
Wavelength = m

V
fλ

19
Q

How do waves change when travelling from shallow to deep water? (3)

A
  • wavelength increases
  • speed increases
  • Frequency constant
20
Q

What is the order of electromagnetic waves in terms of wavelength?

A
  1. Radio
  2. Microwaves
  3. Infrared
  4. Visible (light)
  5. Ultra Violet
  6. X-ray
  7. Gamma

1st being largest

21
Q

What are some common uses of each member of the electromagnetic spectrum?

A
  • Radio - telecommunications
  • Microwaves - heating food
  • Infrared - heating
  • Visible (light) - photography
  • Ultra Violet - tanning booths and counterfeit money detection
  • X-ray - medical diagnostics
  • Gamma - sterilising surgical equipment
22
Q

What are the two pneumonics for speed of sound waves after refraction?

A

Fast
Towards normal
Slow

Slow
Away from normal
Fast

23
Q

What are the two pneumonics for mediums for refraction?

A

Less dense
Towards normal
More dense

More dense
Away from normal
Less dense

(In relation to the normal)

24
Q

What are the two forms of waves? What direction do they travel?

A
  • transverse (perpendicular to linear propegation)
  • longitudinal (parallel to linear propegation)
25
Q

What are rarefactions?

A

Places where the particles in a longitudinal wave are least tightly packed together

26
Q

What is a mechanical wave?

A

A wave that requires particles/matter

GCSE CCEA Physics unit 2 And 3 (8 decks)

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