Tareas

Mechanical Waves – a wave that travels only through matter

Electromagnetic Waves – a wave that travels through matter or an empty space.




WAVES IN NATURE



PROPERTIES OFWAVES
* Wavelength – the distance between the point on one wave
* Frequency – the number of wavelengths that pass a point each second
* Amplitude – maximum distance a wave varies from itsrest position
* Speed – depends on the medium


LIGHT

ELECTROMAGNETIC SPECTRUM

* Radio wave
* Microwave
* Infrared (IR)
* Visible region
* Ultraviolet(UV)
* X rays
* Gamma rays

Radio waves – low frequency, low energy electromagnetic wave that has a wavelength longer than 30 cm.

Infrared – an electromagnetic wave with a wavelengthshorter than a microwave but longer than light.

Ultraviolet – an electromagnetic wave with a slightly shorter wavelength and higher frequency than light.

Transparent – objects appearedclearly

Translucent – objects appeared blurry

Opaque – light does not pass
Intensity – amount of energy that passes through a square meter of space in one second.

COLORS

R= red
O=orange
Y= yellow
G= green
B= blue
I= indigo
V= violet










SOUND

OUTER EAR
Collects and directs sound waves to the middle ear.
MIDDLE EAR
Amplify soundwaves.
INNER EAR
Responsible for equilibrium sensory organs that send signals to the brain.

Properties of sound waves
* Wavelength
* Frequency
* Amplitude
* SpeedDecibel (db) – the unit used to measure sound intensity.
Pitch – the higher the frequency, the higher the pitch of the sound.
Compression – region of a longitudinal wave where the particles of themedium are closest together.
Rarefraction – is the region of a longitudinal wave where the particles are farthest apart.

















THE SUN – EARTH - MOON...