Brainscape's Knowledge GenomeTM

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


See full index

From Flashcardlet > P1 - Waves > Flashcards

P1 - Waves Flashcards

0
Q

What is wavelength?

A

The length of a full cycle of the wave (eg. from crest to crest) in metres

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

What is amplitude?

A

The displacement of the wave from the rest (middle) to the crest (top) in metres

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

What is frequency?

A

The number of complete waves passing a certain point every second measured in Hz (s^-1)

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

What are the 2 types of waves?

A

Longitudinal

Transverse

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

What is transverse wave?

A

A wave where the vibrations are perpendicular to the direction of energy transfer of the wave

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

Which types of wave are transverse?

A

All EM waves

Water ripples

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

What is a longitudinal wave?

A

A wave where the vibrations are parallel to the direction of energy transfer of the wave

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

What is the formula that links wavelength and frequency?

A

Wave speed (m/s) = frequency * wavelength

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

Which types of waves are longitudinal?

A

Sound waves and ultrasound

Shock waves

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

What are the 3 ways that the direction of travel of a wave can be changed?

A

Reflection

Refraction

Diffraction

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

Why can we see objects?

A

Because different light rays reflect off different objects and go into our retina

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

How does changing the surface affect the reflection of light rays off it?

A

An uneven surface causes light to reflect off in all directions so we can’t see a clear reflection

A smooth and shiny surface reflects all of the light rays in one direction meaning that we can see the reflected image

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

What is the law of reflection?

A

Angle of incidence = angle of reflection

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

What is the angle of incidence?

A

The angle between the normal (imaginary line perpendicular to the surface) and the incident ray (the light ray approaching the mirror)

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

What is the angle of reflection?

A

The angle between the reflected light ray and the normal

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

What 4 things is the reflected image and why?

A

Same size as the object (it is as far behind the mirror as the object is in front)

Virtual (appears to be behind the mirror)

Upright

Laterally inverted (the left and right sides are swapped)

16
Q

Describe how you draw a ray diagram for an image reflected in a mirror

A

Draw the reflected image on the other side of the mirror to the actual object (exactly as far away)

Draw an eye looking at the mirror from an angle

Draw the reflected ray coming from the virtual object to the top of the eye with an arrow on the ray to show this (dotted line for the virtual side of the mirror)

Draw the incident ray coming from the real object to the point where the reflected ray and mirror meet (add an arrow on the ray to show this)

Do the last 2 steps again but where the reflected ray meets the bottom of the eye

17
Q

What is diffraction?

A

If the wavelength of a wave is longer than the size of a gap that it has to go through, the wave will spread out when it emerges from the gap

18
Q

What 2 factors affect the amount of diffraction?

A

The narrower the gap, the more the wave spreads out

The longer the wavelength, the more the wave spreads out

19
Q

What does maximum diffraction look like?

A

The emerging waves look like semi-circles

20
Q

How is a diffraction diagram drawn?

A

Lots of parallel vertical lines on the left side of the gap and lots of curved, spread out waves on the right

21
Q

What is refraction?

A

When a wave crosses the boundary between 2 substances, it changes direction

22
Q

What happens if the wave hits a boundary face on?

A

No refraction occurs

23
Q

What happens when a wave hits the boundary at an angle?

A

The wave bends towards the normal

24
Q

What causes refraction?

A

When the wave suddenly changed to a medium that has a different density, it changes speed accordingly and this changes the direction of the wave

25
Q

Describe a diagram of refraction

A

The incident ray hits a glass block (or other more dense medium) and the ray bends towards the normal and is called the refracted ray

When the refracted ray emerges from the fender medium, it travels away at the same angle as the angle of incidence and is called the emergent ray

From Flashcardlet (70 decks)

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