# Waves Flashcards

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1
Q

what are waves

A

travelling disturbances that transport energy from one location to another without transporting matter

2
Q

electromagnetic waves

A

only waves that can travel through a vacuum (empty space without matter)

3
Q

mechanical waves

A

waves that requires a medium to travel through

can travel very large distances, but the individual particles in the medium never move far from their original position.

4
Q

two types of mechanical waves

A

longitudinal
transversal

5
Q

what happens in your transversal wave

A

particles in the medium vibrate, perpendicular to the direction the wave is travelling

when they reach a max or a min point they reach a crest or peak

6
Q

what happens in a longitudinal wave

A

particles in the medium vibrate parallel to the direction the wave is travelling

as wave travels, it creates regions of high pressure (compression) and low pressure (rarefaction) in a medium

7
Q

amplitude (A)

A

maximum displacement of the particles in the medium from their resting position. Measured in metres

8
Q

wavelength (lambda)

A

the distance over which the wave’s shape repeats (distance between peaks)

9
Q

frequeny (f)

A

the number of wace cycles per second. Measured in hertz. Hz = wave cycles per second

10
Q

what is Periods (T)

A

amount of time it takes for one complete wavelength to pass a specified point. Measured in seconds

time is inversely proportional to frequency.

11
Q

velocity

A

displacement/time

V = lamba/T
V = lamba x f