Wave: It is a temporary disturbance that transfers energy from one place to another. It divides into two:
Mechanical Wave
==Longitudinal wave:== it is a particle that @@vibrates in the direction of propagation of a wave@@.
==Transverse wave:== It is a particle that vibrates perpendicular to the direction of the wave.
Electromagnetic Wave
==Red is the electric field==; and is called wavelength; ^^blue is a magnetic field^^.
ELECTROMAGNETIC WAVE
They do not require a medium to propagate. It can also travel not only through the air and solid materials but also through a vacuum space. They travel as vibrations in electrical and magnetic fields.
Notes to remember:
CHARACTERISTICS OF WAVES:
Amplitude (A)
The height of a wave is usually measured in meters (m). The greater amplitude of a wave, the more energy it’s carrying.
Wavelength
The distance between 2 consecutive crests or troughs, and usually measured in meters(m)
Frequency
The number of waves passing a point in a certain time. Gives a unit of Hertz (Hz).
Speed of light (c)
All electromagnetic waves travel at the same speed which is about c=3.0 x 10^8 m/s through a vacuum space.
IONIZING RADIATION
A type of energy released by atoms that travel in the form of Electromagnetic waves. Including Gamma rays and X-rays. This is more dangerous to humans than non-ionizing radiation.
NON IONIZING RADIATION
the part of the electromagnetic spectrum where there is insufficient energy to cause ionization.
it is named for the range of electromagnetic waves when placed in order of increasing frequency.
7 ELECTROMAGNETIC SPECTRUM:
RADIO WAVES
have the longest wavelengths but the shortest and lowest frequency.
MICROWAVES
have a shorter wavelength and have a higher frequency of radio waves.
INFRARED RAYS (below red)
shorter wavelength and higher frequency than a microwave.
VISIBLE LIGHT
shorter wavelength and higher frequency than infrared.
ULTRAVIOLET RAYS
it uses to kill bacteria.
X-RAYS
Can penetrate most matter.
GAMMA RAYS
carries the greatest amount of energy and it penetrates the most.