Download Describe what a repeating vibrating proton or electron causes

Describe what a
repeating vibrating proton
or electron causes.
What are the two parts of
an EM wave?
How is an EM wave
affected by matter?
 Electromagnetic
wave
 It moves through a
vacuum, not needing
matter to move
 It has frequency,
period, wavelength
and amplitude
 A transverse electric
wave
 A transverse
magnetic wave
 Both are at 90º
angles to each other.
 It slows down the EM
wave.
 The matter’s density
& the EM wave’s
speed are inversely
proportional.
What is the speed of ALL
EM waves in space, in
glass?
 300,000km/s.
 200,000km/s
What happens to the
frequency of an EM wave
if its amplitude
increases?
 The frequency
increases.
 They are directly
proportional.
What are the sections of
the EM spectrum, in
order of least amplitude
to most amplitude?
 Radio, microwave,
infrared, visible, uv, X
rays, gamma rays.
What are the sections of
the EM spectrum, in
order of lowest frequency
to greatest frequency?
 Radio, microwave,
infrared, visible, uv, X
rays, gamma rays.
What are the sections of
the visible region of
spectrum, in order of
lowest frequency to
greatest frequency?
 Red, orange, yellow,
green, blue, indigo,
violet
 ROYGBIV
What are the sections of
the visible region of
spectrum, in order of
lowest amplitude to
greatest amplitude?
 Red, orange, yellow,
green, blue, indigo,
violet
 ROYGBIV
What objects emit
infrared waves?
 All objects emit IR
What are EM microwaves
widely used for?
 Communications
 Cell phones, radios
 RTS!
What are five fun facts
about X rays?
 Cannot penetrate thick
objects like bone & lead
 Darken photographic
plates
 Have the 2nd highest
amplitude
 Can penetrate soft body
tissue
 Used to treat cancer
What types of waves can
refract & diffract?
 Mechanical
 EM
What types of waves can
reflect?
 Mechanical
 EM
Why are uv waves used
to disenfect?
 It damages a cell’s
protein and DNA,
killing the ‘germs’.