Brainscape's Knowledge GenomeTM

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


See full index

Physics Year 12 > Waves > Flashcards

Waves Flashcards

1
Q

What is wavelength?

A

Distance between 2 consecutive peaks or troughs

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

What is amplitude?

A

Maximum displacement of a particle from the equilibrium

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

What is peak and trough?

A

Peak- maximum positive displacement
Trough- maximum negative displacement

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

What is frequency?

A

Number of waves in one second

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

What is time period?

A

Time taken for one complete wave

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

What is the formula for frequency and time period?

A

F=1/T
T=1/F

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

What is a transverse wave?

A

When the direction of a particle vibration is perpendicular to the direction of travel of wave
E.g. light/ electromagnetic

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

What is longitudinal?

A

When the direction of a particle vibration is parallel to the direction of travel of wave
E.g. sound/ultrasound

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

Different parts of a wave

A

Peak/crest,wavelength,trough and amplitude

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

Three points on the analogy between water waves and light waves

A

Reflected wavelength = incident wavelength
Reflected frequency = incident frequency
Reflected speed = incident speed

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

What is an echo and what is the calculation for an echo?

A

Echo is a reflected sound
Speed =distance/time
(Remember to half the time as it is an echo)

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

What is ultrasound and what are some uses for it?

A

High frequency sound that is above 20kHz which is above the human hearing range.
Detecting faults in metals, cleaning delicate equipment and breaking kidney stones.

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

What is sonar and radar used for?

A

Sonar: Detects underwater objects using sound pulses
Radar: Detects aircraft’s and ships using electromagnetic waves

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

What do all the waves in the electromagnetic spectrum have in common?

A

Transverse waves
Can travel though a vacuum
Travel at the same speed (Speed of light)

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

Waves in order of increasing frequency and decreasing wavelength

A

Radio waves, micro waves, infrared waves, visible light, ultra violet waves, x-rays, gamma rays

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

What are the dangers of gamma rays and x-rays?

A

Damage cells and disrupt DNA, which may lead to cancer

17
Q

What are the dangers of Ultra violet light?

A

Certain wavelengths can damage skin cells, disrupt DNA and may lead to skin cancer

18
Q

What are the dangers of visible light?

A

Damage the eyes

19
Q

What are the dangers of microwaves?

A

Internal heating of body tissues which can lead to eye cataracts.

20
Q

What the dangers of infrared light?

A

Felt as heat and can cause burns.

21
Q

What are the dangers of radio waves?

A

Believed to cause cancer,leukaemia and other disorders.

22
Q

What do waves do in shallow water?

A

Travel slower.
Shorter wavelength.
Same frequency

Physics Year 12 (6 decks)

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