# Unit 2 - Physics Flashcards Preview

## Physics AS Edexcel > Unit 2 - Physics > Flashcards

Flashcards in Unit 2 - Physics Deck (25)
1
Q

What is the amplitude of a wave?

A

On a graph with displacement as the Y axis, the height of the wave above or below the 0 line, maximum amplitude is to the wave peak but all points on the wave have an amplitude

2
Q

What is the period of a wave?

A

On a displacement-time graph, it is the time from one peak to the next

3
Q

What is frequency?

A

The number of wave cycles per second, symbol f, measured in Hertz (Hz)

4
Q

What is a waves phase?

A

How far through the waves cycle a given point is, measured as the angle as if a complete cycle is a circle, can be degrees or radians

5
Q

What is wave speed?

A

The rate of movement of the wave, the speed the wave moves at

Wave speed = frequency x wavelength

v=fλ

6
Q

How is frequency calculated?

A

Frequency = 1/period

f=1/t

7
Q

What is the time period of a wave?

A

The time between wave peaks

8
Q

What is wavelength?

A

The distance between a point on a wave and the same point on the next cycle of the wave

9
Q

How is the time period calculated?

A

Time period = 1/frequency

t=1/f

10
Q

What is phase?

A

The stage a point on a wave is through a complete cycle, measure as an angle in degrees or radians

11
Q

What is a longitudinal wave?

A

A wave where the amplitude travels along the direction of movement, eg. A sound wave

12
Q

What is a transverse wave?

A

A wave where the amplitude moves at 90 degrees to the line along which the wave travels, either up and down or left and right

13
Q

How does a speaker work?

A

A magnet moves a cone back and forth to compress air and as such create sound waves at the frequency and amplitude of the cones vibration

14
Q

What is a compression? (Waves)

A

An area in a longitudinal wave in which the particles are closer together than at their equilibrium state

15
Q

What is a rarefaction? (Waves)

A

An area in a longitudinal wave where the particles are further apart than at their equilibrium state

16
Q

What is a node?

A

A point on a transverse wave where there is never any amplitude

17
Q

What is an antinode?

A

A point on a transverse wave where the maximum amplitude occurs

18
Q

What is a standing wave?

A

Stuff

19
Q

What are wavefronts?

A

Lines connecting points on a wave at the same position in the waves cycle

20
Q

What is superposition?

A

Things

21
Q

What is constructive interference?

A

The superposition effect when two waves are in phase, causing a bigger resultant wave

22
Q

What is destructive interference?

A

The superposition effect when two waves are in anti phase, making a smaller resultant wave

23
Q

What is a progressive wave?

A

A wave that transfers energy through oscillations

24
Q

What is a sonometer?

A

A piece of apparatus consisting of a tensioned wire for experimenting with frequency

25
Q

How is wavelength measured?

A

On a displacement-distance graph, from a point on a wave to the next point with the same amplitude and direction, usually from peak to peak, measured in metres, symbol λ