6.1 Waves Flashcards
For ripples on water what is the thing that is travelling
The wave not the water
What to all longitudinal waves require ?
A medium
What is amplitude
The maximum displacement of a point on a way away from its undisturbed position
On wave it from the middle line to one of the curves - transverse
Wavelength
The distance from one point on wave to the equivalent point on adjacent wave
Length of one full curve
Frequency
Number of waves passing a point each second
Unit of frequency
Hertz
Period
The time for one wave to pass point
Wave speed
The speed at which the wave moves through the medium
Wave speed
Wave speed = frequency x wavelength ( m)
What is light an example of
An electromagnetic wave
What are electromagnetic waves
Transverse waves they transfer energy from the source of the waves to an absorber
What is good example of electromagnetic waves
A microwave oven - transfer energy from the source to food
Solar panels explained
Light waves transfer energy from the source the sun to the absorber ( solar panels
What if we pass white light through a prism ?
It’s splits into a spectrum
On the red end of the spectrum what do the waves have
Lower frequency and longer wavelength
What is the violet end of the spectrum like
Higher frequency and shorter wavelength
What is the only part of the spectrum that can be detected by the human eye
Visible light
Order of spectrum
Radio Microwave Infrared Visible light Ultra violet x rays Gamma rays
Describe frequency from radio waves to gamma waves
Wavelength decreases
Frequency increases
When waves travel though medium what happens
The particles of the medium oscillate and transfer energy
If the wave is absorbed what happens
The wave transfers energy to materials energy stores
What happens if wave is transmitted through second Material
The wave carries on travelling through the new material
What happens if a wave is reflected
This is where an incoming wave is neither absorbed or transmitted but sent back from second material
When wave meets boundary between two materials what happens
Absorbed by the second material
Transmitted
Reflected
Why is spectrum called continuous
The cut of point between one type of wave and another wave is unclear
Do electromagnetic waves need a medium to travel though
No
What can electromagnetic waves travel through if medium not needed
Vacuum (space)
What is the speed that electromagnetic waves travel at
300000000
3x10^8
When waves change speed what else can they do
Change direction moving from one medium to another
