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WAVES

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by

Se Min Park

on 26 May 2015

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Transcript of WAVES

Reflection
Let's carry on...What are some properties of these "Waves"?
WAVES
SaeBin(Beth) Jung; Josiah Ryan; Se Min Park
What ARE "Waves"?
A wave is a series of rhythmic disturbances that carry energy without carrying matter.
SO...WHERE DO THEY COME FROM?
Obviously, waves occur from any type of applied force that causes vibrations in matter. It is an energy transport phenomenon-energy moves through, but not with, the matter.
DID YOU KNOW?
tHERE ARE
2
TYPES OF Mechanical WAVES-
tRANSVERSE

AND

LONGITUDINAL
.

COMPOSITION OF A TRANSVERSE WAVE
COMPOSITION OF A LONGITUDINAL WAVE
REFRACTIONS
DIFFRACTIONS
diffraction IS THE Bending of waves around a barrier.
A reflection of a wave Occurs when a wave strikes the surface of an object and bounces off.
INTERFERENCE
Interference between waves Occur when two waves meet while traveling along the same medium.
SOUND waves

REFLECTIONS
-eCHOS
-rEVERBERATIONS
REFLECTIONS
-rEVERBERATIONS

-eCHOS
dIFFRACTIONS
-ultrasounds(do you even bat?)
REFRACTIONS
-mEDIUM MATTERS
bEEP
BEEP
BEEP
INTERERENCE WITH SOUND WAVES
SONAR...SONAR?
SONAR(SOund Navigation and Ranging
System that uses the reflection of underwater sound waves to detect objects.
ECHOLOCATION
ELECTROMAGNETIC WAVES
No medium? no problem.
Unlike transverse waves, it can travel through vacuums. it is Made when charged particles(Electrons) vibrate. produces radiant energy.
WAVES
AND
PARTICLES...BUT HOW?
IT'S OKAY. ACCEPT THE FACT THAT THEY'RE INDEED BOTH. unless you want to study atoms and stuff.
MEDICAL USES OF ELECTROMAGNETIC WAVES
Components of waves
transverse waves: crest, trough, wavelength, frequency, amplitude
Longitudinal: compression, rarefaction, wavelength
INFRARED WAVES:
-USED TO TREAT THE AGING/MAL
NOURISHED SKIN.
UV RAYS:
-TREATMENT OF JAUNDICE IN
BABIES.
-STERILIZATIONS OF MEDICA
L EQUIPMENT.
ELECTROMAGNETIC FIELDS:
-DISSECTIONS OF MALIGNA
NT TUMORS IN THE BODY.
Dangers of electromagnetic waves
Alpha:
LUNG CANCER.
Beta:
THYROID CANCER/BONE+TEETH DYSFUNCTION.
Gamma:
MOST RADIATION SICKNESSES(VARIOUS CANCERS).
Other:
PARKINSON'S/ALZHEIMER'S
wHEN THE LIGHT WAVES HIT THE MIRROR(sURFACE), THEY BOUNCED BACK.
lIGHT SOURCE
WAVES BOUNCING BACK THE OPPOSITE DIRECTION
A refraction is The bending of a wave as it moves from one medium into another-lighter to denser.
THAT'S ALL, FOLKS...
BUT

WERE YOU LISTENING?
THE DIFFERENCE BETWEEN tRANSVERSE/lONGITUDINAL WAVES?
A. Longitudinal waves do not require a medium-Transverse waves do.
B. Transverse waves are faster.
C. Longitudinal waves have a higher frequency than Transverse waves.
D. Let me go ask my Mommy...
A.
CT/CAT SCANS
--Computed/Computerized (Axial) Tomography.
--Directing X-rays to penetrate the body in areas depending on their density.
--A black/white 2-D image appears with cross-sections of the organs.
--Iodine is often added as a dye to highlight some parts of the body.
PET SCANS
--Uses CT and a tracer-(Radioactive material that eventually drains out).
--Detects the gamma rays the tracer emits from the body.
--Shown in 2-D cross sections on a scanner.
--Detects cancerous tumors(Use glucose for rapid cell division).
MRI SCANS
--The protons in the H ions of our body line up in the same direction, by powerful magnetic scanners.
--MRI scanners change their magnetic field directions and the protons move.
--The lines reassemble and emit radio signals for the receivers to pick up.
--Computers regenerates the signals into exact images.
LABEL THE DIAGRAM WITH THE COMPONENTS OF WAVES.
What is a refraction of a wave?
What is
a good example to illustrate this particular trait of
w
aves?
A) The bending of a wave as it moves from one medium into another-lighter to denser.
B) Remeber the pen? It appears bent as it moves from a lighter medium(Air) into a denser
medium(Water).
What does SONAR stand for?
a. SOUND ON NAVIGATION RANGING.
b. sOUND nAVIGATION AND RESONANCE.
c. sOUND NAVIGATION AND RANGING.
d. sONS ON nUCLEAR AVENGERS RANCH.
c.
Label the picture of an electromagnetic wave.
DID YOU GET THEM ALL?
wHO WAS THE FIRST TO ACCEPT THE WAVE-PARTICLE DUALITY OF LIGHT?
A. EINSTEIN.
B. nEWTON.
C. tHOMAS YOUNG.
D. EDISON
a.
wHAT ARE SOME MEDICAL USES OF em WAVES?
A. sTERILIZATION OF MEDICAL EQUIPMENT.
B. TREATMENT OF JAUNDICE.
C. DESTRUCTION OF CERTAIN MALIGNANT TUMORS.
D. ALL OF THE ABOVE.
D.
CONGRATULATIONS, YOU ARE NOW A WAVE EXPERT...
thANK YOU FOR LISTENING!
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