3.3.18 Waves Flashcards


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created 2 years ago by milovaiska
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1

What type of wave is a sound wave?

Longitudinal

2

Sound is an example of a longitudinal wave caused by ... in the air.

vibrations

3

What's amplitude measured in?

(decibeles)metres

4

Which piece of equipment increases the size of a current produced in a microphone?

amplifier

5

The amplitude

how loud the sound wave is

6

What numbers are at the two ends of the decibel scale?

0-180

7

What does an oscilloscope show?

sound wave on a screen

8

What does an oscilloscope measure?

voltage waves

9

What type of current flows inside a loudspeaker?

electric

10

Give characteristics of a wave that we can record using an oscilloscope:

  • amplitude
  • wavelength
  • frequency

11

What is the top of the wave?

what is regions of low pressure due to particles being spread further apart?

card image

crest

rerfaction

12

What's the meaning of longitudinal?

Longitudinal means that the wave moves in the same direction that the particles in the air are vibrating.

13

longitudinal wave

card image

14

transverse wave

card image

15

What is the amplitude?

the distance from the centre line (or the still position) to the top of a crest or to the bottom of a trough .