5.1 Wave Behaviour

Question 1

Amplify (a signal)

Answer 1

Increase the amplitude, make louder

Question 2

Amplitude

Answer 2

The maximum displacement of a wave

Question 3

Echo

Answer 3

A reflection of sound

Question 4

Echo-sounding

Answer 4

A process of finding distance using the time for the reflection of a pulse of sound

Question 5

Electromagnetic wave

Answer 5

A wave that consists of oscillating electric and magnetic fields; one of a spectrum ranging from radio waves to gamma waves

Question 6

Frequency

Answer 6

The number of waves per second (related to the pitch of a sound)

Question 7

Longitudinal

Answer 7

A wave whose vibrations are in the same direction as the the direction of energy transfer of the wave

Question 8

mechanical waves

Answer 8

Waves that require a medium (eg. Air, water) to travel through

Question 9

Microphone

Answer 9

A device that converts a sound wave into an electrical signal

Question 10

Natural frequency

Answer 10

The frequency at which an object oscillates if it is displaced

Question 11

Normal

Answer 11

A line at 90 degrees to the surface where the wave hits it

Question 12

Oscilloscope

Answer 12

A device that shows a changing potential difference on a screen

Question 13

Ossicles

Answer 13

The small bones found in the middle ear that vibrate when a sound wave enters the ear. They amplify the vibration before passing it on to the oval window.

Question 14

Oval window

Answer 14

A part of the inner wave that receives vibrations from ossicles, passing them on to the cochlea

Question 15

Refraction

Answer 15

The change in direction of a wave when its speed changes as a result of going from one medium to another

Question 16

Resonance

Answer 16

The large-amplitude oscillation that happens when you make something oscillate at its natural frequency

Question 17

Sonar

Answer 17

Sound navigation and ranging, a method of working out the distance to objects or navigating using sound

Question 18

Sound wave

Answer 18

A wave produced by a vibration that needs a medium to travel through

Question 19

Time period

Answer 19

The time for one wave to pass a given point, measured in seconds

Question 20

Transverse

Answer 20

A wave whose vibration are at right angles to the direction of transfer of energy by the wave

Question 21

Vibrations

Answer 21

The backwards and forwards motion of a solid, or particles, displaced from an equilibrium position

Question 22

Wave velocity

Answer 22

The speed at which the energy of information of a wave is transferred, equal to frequency X wave length

Question 23

Wave length

Answer 23

The distance from one point on a wave to the same point on the next wave