waves Flashcards
disturbances that travel through a medium to one place to another.
waves
substance carrying waves (solid, liquid, gas)
medium
perpendicular movement, electromagnetic wave.
transverse waves
parallel movement sa propagation
longitudinal wave
if megnetic is present so does the
electric
parts of wave
crest, trough, amplitude, wave length (2), one wave, rest position
maximum positive upward displacement for the rest position
crest
point that exhibits the maximum negative downwars displacement for the rest position
trough
wavelength
length of one complete wave cycle (1 crest to another)
calculated the speed of electromagnetic wave to be 3.0 x 10 to the power of 8 m/s
james clerk maxwell
space with no matter
vacuum
prediction regarding electromagnetic wave
1862
heinrich hertz may nao observe na daw na electromagnetic wave
1887
refers to the time required to complete one cycle
waves period (T)
Unit of T:
S (seconds)
the number of cycle per time
Frequency (f)
unit of f:
Hz
distance the wave covers per cycle of propagation
wavelength
codename for types of electromagnetic waves
Raging Martians Invaded Venus Using X-Ray Guns
types of electromagnetic waves
Radio Wave
Microwave
Infrared
Visible light
Ultra-Violet
X-Ray
Gamma Ray
electromagnetic spectrum
continuous range of electromagnetic waves arranged in order of frequency or wavelength
what is radiowave?
mas mahaba wavelength kesa kay gamma ray, lowest frequency.
Discovered by Heinrich Hertz.
uses: broadcasting, information
long distance communication rely on
transmission and reception of electromagnetic wave such as radiowaves and microwaves
to send signal
antenna
antenna na bilog
dish
converts electrical signal into radio wave
antenna
converts electric current to radiowave
transmission
radio wave to electric current
reception
difference between am and fm
notes
walkie talkie should have the same
channel and frequency
RADAR meaning
Radio Detection and Raging
when do we use RADAR?
air traffic control in NAIA, military surveillance
example of RADAR
tagaytay dopler radar: PAGASA: weather forecasting
examples of radio wave
radar
speed gun
automatic door
RFID
MRI
RFID AND MRI MEANING
Radio Frequency Identification
Magnetic Resonance Imaging
viewing internal parts of human body without invasive surgery
mri
what is microwave?
wavelength: 1m-1mm
frequenccy: 3.0 x 10 to the power of 8 - 3.0 x 10 to the power of 11
long distance communication
GPS Global positioning System
high frequency = used communication
WLAN
wireless local area network
enable communication between WAP wireless access point or mesh
uses of microwave
microwave,
microwave ablation, - heat to shrink/ destroy tumors
microwave imaging - assess and monitor breast cancer via tomography
WHAT IS INFRARED?
occupies wavelength roughly btween 1 mm and 700 nm
discovered by william herschel
the frequency of infrared is lower than the red light
short distance commu - REMOTE CONTROL OPERATE TV, AND AIRCONS
USES OF INFRARED
night vision system: producing images, military
cctv: equipped with night vision apparatus
infrared grill: shawarma
what is visible light?
wavelength 700 nm to 400 nm
sunlight, colors
red has the longest wavelength: low frequency - inversely prop
violet has the shortest wavelength: high frequency
uses of visible light
laser
light amplification by stimulated emission
made of tubes with mirror on both ends and a material that can be stimulated
cut wood and metals; burn or melt
optical disc: reading contents of an optical disc; cd
laser eye surgery or lasik eye surgery.
what is ultraviolet wavelength?
lamnda of 400 nm to 10 nm
Johann Wilhelm Ritter
ultra menas going beyond
USES OF ULTRAVIOLET
Fluorescence - phenomenon where substances absorb UV radiation and emit visible light
SUN: MAJOR SOURCE OF UV RAYS
money counteright, crimes, forensic investigation, purify air, insect trap
ca pass through several opaque
X-rays and Gamma Ray
what is x-ray?
10 nm to 100 pm
Wilhelm Conrad Roentgen
sometimes called roentgen ray
uses of x-ray
baggage screening
medical x-ray
what is gamma ray?
less than 100 pm
paul villard
sources of gr:
sun, intersellar clouds, remnants of supernova (exploding stars)
uses of gamma ray
radiation theraphy - destroy cancer cells
effects of electromagnetic wave in our envi
light is responsible for plants and photosynthetic organisms to survive and to produce by-products in which biological
process of photosynthesis
sunlight
carbon dioxide
water
oxygen (by-product)
sugar (main product)
photosynthesis use
light energy to produce glucose and oxygen, generate food and energy
particle of light
photon
carry particular amount of energy
photon
pagtaas ng frequency at pagtaas ng energy
true haha
name the 2 stages of photosynthesis
light dependent and light independent
light depended reaction
electron gain energy and become excited when chlorophyll absorbs light
remember
faster movement
fast collition
more energy
collapse
where photosynthesis takes place
chlorophyll
inside chlorophyll
thylakoid
where photosynthesis happens
leaves
chloroplasts
chlorophyll
process : kapag na ecite and photon pupunta sa primary electron acceptor
photo activation
what will replace the electronthen separate oxygen and hydrogen atoms
h2o
store energy to store future reactions
ATP
ATP
Adenosine Triphosphate
use for second stage of photosynthesis, acts as fuel
NADPH
NADPH
Nicotinamide Adenine Dinocleutide Phosphate
what is greenhouse?
the place needs to control heat
trap heat
made of glass walls but now is plastic
tomato
what is greenhouse effect?
gasses are rapped in earths atmosphere
Joseph Foreigher in 1824 ( build building with objects inside, the heat is still inside
greenhouse gasses trap?
carbon dioxide, methane, nitrous oxide, water vaper, short wavelength.
responsible for trapping
greenhouse gasses
