A _____ IS A TEMPORARY DISTURBANCE
THAT TRANSFER ENERGY FROM ONE PLACE
TO ANOTHER
WAVE
waves in water and sound waves in air- ex
Mechanical Waves
Matter such as solid, liquid, gas or plasma that
mechanical waves are traveling through is called
a _____.
medium
do not require a medium to
propagate.
EM waves
electromagnetic waves can
travel not only through air and solid materials.
but also through a vacuum space. do not require medium to propagate
true
(EM) waves are formed when
electric field comes in
contact with a _____.
The fields of an em wave
are perpendicular (at
right angles) to each
other. perpendicular to the
direction of the EM
wave.
magnetic
field
EM waves travel with a constant velocity
of ____ in vacuum.
3 x 108 m/s
EM waves are
transverse waves
what are the characteristics of Waves
Amplitude, Wavelength, Frequency
height of wave, in meters
amplitude, the greater the amplitude, the more energy
the distance between 2 consecutive crests and troughs in meter
Wavelength
number of waves passing a point in certain time (1sec), it unit is hertz (hz)
1 hz=1 wave per sec
The number of crests of a wave that move
past a given point in a given unit of time
frequency (f)
all electromagnetic wave travels
at the same speed which is about 3.0x108 m/s
through a vacuum.
Speed of Light (c)
the greater the amplitude the more energy it carries, a is directly proportional to e
true
speed (c/v)
freq (f/hz) wavelength(a)
yes
defined as the entire range of
electromagnetic waves from low to high
frequency.
EM Spectrum
are radiations in the form of heat, light and
electromagnetic energy, which are propagated
in space at the speed of light.
They carry energy from one place to
another.
EM Waves
The various forms of EM waves include
radio
waves, microwaves, infrared waves, visible
light, ultraviolet radiation, X-rays and gamma
rays.
They obey the equation v = fλ.
EM WAVES
_____ are waves that
oscillates perpendicular to the axis along
which the wave travels.
Transverse waves
f = frequency
Unit: hertz (Hz) or s^-1
true
in visible light spectrum, which color has the longest wavelength and the lower frequency?
red light
which color has the shortest wavelength and higher frequency?
violet light
