Definisi, Mekanisme, Aplikasi, Contoh alat

1. INFRARED AND MICROWAVES
Kelas XI-4
SMK-SMAK Bogor

2.  Norma Yunita Chandra Dewi
 Nur Aulia Fitriani Kuntari
 Nur Ghaffar
 Rimaliani Adya Putri
MEMBERS

3. MICROWAVES

4. Microwave is wave with a super high frequency (SHF).
It’s a radio wave with the highest frequency, more than
3Ghz up 300Ghz. The wavelength is 1mm until 1m. If a
microwave is absorbed by something, then it will show the
effect of the heat on it

5. The Wavelength Frequency Area
Microwave with a wavelength between 1 millimeter to 1 meter.
Or has frequency between 300 MHz (0.3 GHz) up to 300GHz.

7. The Inventor of Microwave
Recognized by some people as the father of modern
physics, James Clerk Maxwell was a very influential
figure in the field of electricity, thermodynamics,
photography, nuclear energy, and others. Invention of
the electromagnetic spectrum that affect the
development of television, radio, the microwave, and
help in the development of radio and infrared.

8. The Inventor of Microwave
Equations on electromagnetic field is very
important for the theory of special relativity, by
Albert Einstein. He also produced the first color
photograph. His work really marks advances of the
work of another great scientist Isaac Newton, and
help to inform the science behind many of the
technological developments of modern times.

9. Microwave station works with the help of the antena,
receiver, and other equipment needed for data
transmission communication with microwaves.
Microwave signals can transmit data at speeds up to 45
Mbps, but because of microwave signals is moving in one
direction straight line

10. 1. Warming.
We are certainly familiar with the name of a
microwave oven that we use in the daily life to
heat the food. Microwave oven use microwave in
the frequency of about 2.45 GHz
2. Telecommunications
For those who love to take advantage of hotspots are certainly
familiar with WiFi. And also for those who fond of using
bluetooth to transfer files between mobile phones or mobile
phone with a computer

11. 3. Radar and navigation
Radar also uses microwaves to detect an object. Accordance
with its name radio detection and ranging, radar utilizing the
wave reflection from the object for detection.

13. Microwave Oven
a. Radiation Wave
Microwave oven use 2.5 GHz of frequency of
the radio waves to heat the food. The wave
propagate by radiation.
b. Dielectric Heating
The phenomenon where radio waves heat the
dielectric material
Concept

14. How A Microwave System Work?
1.Alternating electric current to stay in line with current potential low and high changed the
potential difference in the form of direct current
2.This current magnetron use with the frequency to produce 2,45 ghz microwave
3.Microwave directed by a antenna in the top of magnetron into a waveguide
4.Microwave a waveguide continue to a device like a fan , called with stirrer .Spreading stirrer in
a microwave .
5.Microwaves are then reflected by a wall in an oven and absorbed by the molecule food
molecules
6.Because every wave have a positive and negative components , the molecules food urged the
fore and back during the 2 times the speed of the frequency of microwave , namely 4.9 million
times in each second .

15. INFRARED

16. We are surrounded by infrared every moment of every day.
Warm objects, such as the human body, produce large
amounts of infrared.

17. Definition
Infrared (IR) is invisible radiant energy,
electromagnetic radiation with longer
wavelengths than those of visible light.

18. Discoverer
Discovered in 1800 by
astronomer Sir William
Herschel. It was an
accidental discovery, as at
the time he was trying to
devise a way of cutting down
the glare of looking at the
sun through a telescope.

19. The Wavelength Frequency Area
From the nominal red
edge of the visible
spectrum at 700
nanometers
(frequency 430 THz)
to 1 mm (300 GHz).

20. Infrared energy is emitted or absorbed by molecules when they change
rotational-vibrational movements. Infrared energy elicits vibrational
modes in a molecule through a change in a dipole moment.
Mechanism

21. Application
 Temperature : Used to measure the temperature of objects that
can’t we touch.
 Night Vision : Infrared is used in night vision equipment when there
is insufficient visible light to see.
 Remote Control : The basic premise at work in an IR remote control
is the use of light to carry signals between a remote control and the
device it's directing

23. How does equipment work?
1. A conventional lens captures
some infrared light nearby.
2. All of the light is sent to an
image intensifier tube
3. Tube amplifier image has
photokatoda amplifier that
converts the energy photons into
electrons.

24. 4. The electrons then pass through the
electron tube is also removed from the
atoms located around the tube that
passes through a container called
'microchannel' (MCP). MCP is a small
glass disc that has millions of
microscopic holes in it. When electron
from the first electrode bumping
photocathode MCP, an acceleration in
the glass microchannel with 5000 volt
bursts transmitted on each pair of new
electrode. Electron collision results also
collide with other atoms, creating a
chain reaction.

25. 5. The end of the tube amplifier,
the electrons hit the screen
coated with this phosphor.
Electron maintain its position so
as to produce perfect images
when electrons are in the middle
of the same with this real.
Phospor photon creates a green
image on the screen that are
characteristic of the night vision
illustration of a green phosphor
viewed through another lens
called 'ocular lens', which allows
to be enlarged and made more
focused image.

26. Conclusion
All of object that have temperature produce infrared
waves. Infrared is very usefull in daily life. But, strong
radiation infrared waves is danger for human’s health.
Microwave is one of the example of the spectrum of
electromagnetic waves, which have the wavelength 1m-1 mm
with the frequency 3GHz until 300GHz. Widely used in
warming, communication systems and radar systems. Where
one of the example is the microwave oven.

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