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4.1.4 Building Blocks - Waves > S4.1.4 Glossary > Flashcards

S4.1.4 Glossary Flashcards

1
Q

Alternating current

A

Current which continually changes direction

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2
Q

Amplitude

A

The height of a wave from the midpoint

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3
Q

Compression

A

Areas when particles are closer together

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4
Q

Crest

A

The highest point of a wave, also called a peak

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5
Q

Electromagnetic

A

A wave which is generated by changes in electric and magnetic fields

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6
Q

Frequency

A

The number of waves per second

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7
Q

Gamma rays

A

A very high frequency EM wave

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8
Q

Hertz

A

The unit of measurement for frequency

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9
Q

Infrared

A

A relatively low frequency EM wave which is felt as heat

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10
Q

Longitudinal

A

A wave with oscillations parallel to the direction of travel

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11
Q

Medium

A

Something a wave can travel through, e.g. solid, liquid or gas

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12
Q

Microwave

A

A low frequency EM wave

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13
Q

Oscillation

A

The vibrations of a wave

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14
Q

Peak

A

The highest point of a wave, also called a crest

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15
Q

Period

A

The time for one complete wave to pass

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16
Q

Radio wave

A

A very low frequency EM wave

17
Q

Rarefaction

A

Areas when particles are further apart

18
Q

Ray diagram

A

Shows the direction of light rays during reflection or refraction

19
Q

Reflection

A

When a wave bounces off a surface, e.g. a mirror

20
Q

Refraction

A

When a wave changes direction as it enters a different medium

21
Q

Ripple tank

A

A shallow tank of water used to create small waves (ripples)

22
Q

Speed

A

A measure of the distance travelled in a given period of time

23
Q

Transverse

A

A wave with oscillations perpendicular to the direction of travel

24
Q

Trough

A

The lowest point of a wave

25
Q

Ultraviolet

A

A relatively high frequency EM wave

26
Q

Visible

A

Able to be seen with the naked eye

27
Q

Velocity

A

A measure of speed in a certain direction

28
Q

Wave front

A

An imaginary line to show the how a wave changes direction

29
Q

Wavelength

A

The length of one complete wave

30
Q

Wave

A

Something which transfers energy from one place to another

31
Q

X-ray

A

A high frequency EM wave

4.1.4 Building Blocks - Waves (2 decks)

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