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Physics Edexcel > Wave Motion > Flashcards

Flashcards in Wave Motion Deck (24)
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1
Q

Wave Fronts

A

A line joining the points at the same position along a wave

2
Q

Periodic Time

A

The time it takes for an oscillation to repeat

3
Q

Frequency

A

The number of oscillations of cycles in one second

4
Q

Frequency / Time Period Equation

A

f = 1/T

5
Q

Wave Equation

A

Velocity = frequency x wavelength

6
Q

Phase

A

Waves are the same

7
Q

Phase difference

A

Described through radians, how many cycles the wave is out of phase

8
Q

0 / 360 degrees in radians

A

2 pi

9
Q

180 degrees in radians

A

pi

10
Q

90 degrees in radians

A

2/pi

11
Q

270 degrees in radians

A

3pi/2

12
Q

Transverse Waves

A

Displacements perpendicular to the wave velocity

13
Q

Radio Wave Wavelength

A

10^3 - 10^1

14
Q

Microwave Wavelength

A

10^-2

15
Q

Infrared Wavelength

A

10^-5

16
Q

Visible Wavelength

A

10^-7

17
Q

Ultra Violet Wavelength

A

10^-8

18
Q

x-ray Wavelength

A

10^-10

19
Q

Gamma Wavelength

A

10^-12

20
Q

Constructive Interference

A

Two Troughs / Two Crests in phase create a wave doubled in intensity

21
Q

Destructive Interference

A

Two Troughs / Two Crests out of phase create a wave halved in intensity

22
Q

Longitudinal Waves

A

Displacements in the same direction as the wave velocity

23
Q

EM waves

A

Made up of electric and magnetic fields

24
Q

EM waves travel at

A

3x10^8 ms-1