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Transcript of Waves
Types of Waves
:waves that require matter to transfer energy
the medium moves forward and backward along the direction the wave travels
Components of Transverse Waves
: the high point on the wave
: the low point on the wave
: the distance from the top of one crest to the top of the next crest
the number of wavelengths that pass a given point in 1 second.
is a mechanical wave that can travel through air, solids, liquid and other gases.
Without a medium, there would be no sound waves
Properties of waves
transfers energy in a
substance or material that carries the wave
Refraction is the bending of wave as it moves from one medium into another
WAVES can only exist if there is energy that they can carry!
is produced by the force or pressure from the vibration of an object.
when you speak, there is a
happening in your throat which creates
is the bending of waves around a barrier
The ability of two waves to combine and form a new wave when they overlap
two pulses completely destroy each other
The Electromagnetic Spectrum
carry the least energy
PROPERTIES OF SOUND WAVES
Refraction is the bending of waves when they enter a medium where their speed is different.
Experiment of reflection
Television signals and radio signals
radio waves cause electrons in another piece of metal(antenna) to vibrate.
an alternating current forms
a picture is produced on TV screen
used to transmit phone calls
Night Vision Devices
is electromagnetic waves you can detect with your eyes
disinfect surgical equipment
USES OF ULTRAVIOLET WAVES
kill bacteria in food
RESONANCE=When one object is vibrating at the same natural frequency of the second object forces into vibrational motion.
DOPPER EFFECT= the change in frequency that occurs when a source of sound is moving relative to a listener. Dopper effect occurs when a sound source or a listener is moving.
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go through skin and damage cells inside.
Dense materials needed for prevention
(specialized equipment required)
* a stream of small
of energy called
light, short-ranged particle, and is actually an ejected electron
by SunBin & Inhye
Magnetic Resonance Imaging
Applications of EMS in Medicine
Components of Longitudinal Wave
Positron Emission Tomography
The doctors inject a radioactive drug called tracer into your bloodstream
A form of glucose
Made up of carrier molecules
1. Alter Magnetic Field
2)The hydrogen ions orientate into different direction
3)The magnetic field is changed
4) The hydrogen ions orientate into different position, and they give out waves
5) The waves are detected by the antenna
6)The antenna feeds the information to the computer
7) The software uses the data to turn it to an image
uses x-rays to create pictures of cross-sections of the body.
Infrared waves are used to treat pain as well
To treat jaundice