Physics - Waves (Year 9 Term 1.1)

Particles in phase, wavelength, frequency, wavefront, wave speed, waves, transverse, longitudinal, amplitude, speed of sound, speed of light, letter representatives of numbers

What are particles in phase?

Particles in a wave which reach their amplitude at the same time

Wavelength

The minimum distance between two in phase particles

Frequency

the number of waves passing a point in a second

symbol of frequency

f

what is frequency measured in?

Hertz (Hz)

what does the unit herts (HZ) mean?

it is equivalent to one second

what does 5 hertz mean?

5 waves per second

Wavefront

represents a single wave from above

wave speed

The distance travelled by a wave each second

wave speed symbol

v

wave speed measurement

Metres per second (m/s)

the two equations to calculate wave speed

1. distance over time

2. frequency x wavelength

2. frequency x wavelength

wave

movement of energy with no net movement of particles

the 2 types of waves

transverse and longitudinal

oscillation

back and forth movement

what should you say instead of ‘direction of wave’?

‘direction of energy transfer

transverse wave

oscillations are perpendicular to the direction of energy transfer

what tells you that a wave is moving?

the movement of the wave’s peak

longitudinal wave

waves where the oscillation is parallel to to the direction of energy transfer

what must be there for longitudinal waves?

a medium whose particles can move back & forth

compression

where the particles in a longitudinal wave are close together

rarefaction

where the particles in a longitudinal wave are spaced apart

amplitude

The maximum displacement from the equilibrium position during a wave or oscillation.

symbol of amplitude

A

measurement of amplitude

meters (M)

Fill the blank : one oscillation gives ____

one wavelength

Speed of light

300,000,000 m/s

Speed of sound

340 m/s

What does k represent in numbers?

1,hat doW000 / thousand

What does M represent in numbers

1,000,000 / million

What does G represent in numbers?

1,000,000,000 / billion hat doeW

What does T represent in numbers?

1,000,000,000,000 / Trillion