mechanical waves
why can't you hear in space
there is no medium for the sound waves to travel
unlike mechanical waves, how can EM waves travel
through empty space, do not require a medium
a wave with a higher frequency will also have a
shorter wavelength
A signal that is a binary code , its on or off
digital
when light bounces back
reflection
the type of wave where energy moves at right angles compared to the wave ( most common )
transverse
All EM waves have the same
amplitude
frequency is measured in
hertz
this is the more reliable way of the two signals
digital
when light passes through a material
transmission
sound waves are this type of wave
longitudinal ( compressional )
Gamma Rays are more harmful then radio waves because they have a higher
frequency
color is visible light with a slightly different
frequency or wavelength
this signal is one continous stream
analog
when light does not bounce back or pass through a material it is
absorbed
seismic waves need a medium to travel through , therefore they are considered
mechanical
the lowest frequency EM waves are
radio waves
Waves carry this
energy
Hot pockets take two minutes if placed in this type of EM wave
microwave
joysticks on a video game controller send a continous stream so they are considered ____________ stick
analog
a sound wave with a larger amplitude will be what compared to a sound wave with small amplitude
louder
the only frequency of EM waves that humans can see
visible light
explain the difference between mechanical and EM waves
Em waves do not need a medium to travel through
the color with the longest wavelength is
red
the a button on a video game controller is either on or off so it is
digital