Practical Applications of the Different Regions of the EM Spectrum - Microwaves and Infrared Waves
it is considered an active remote sensing system because it actively sends a microwave pulse and senses the energy reflected back.
Radar technology
these similar in size to the wavelength of higher-frequency microwaves.
Raindrops and hailstones
Satellites in geostationary orbit are useful for communications since a microwave antenna can be aimed at them without having to know their exact location.
Television
hollow pipes that conduct microwaves along their inner walls. They are constructed from materials of very high electric conductivity and must be of precise design.
Waveguides
it operate only at very high frequencies, so they are ideal microwave conductors
Waveguides
it can work in two very different ways, depending on the technology used.
Night Vision
these are example of active remote sensing instruments that use microwave frequencies.
Doppler Radar, Scatterometers, and Radar Altimeters
from the ground have increased the distance that can be covered in one hop.
Earth satellites relaying microwave signals
This works by collecting the tiny amounts of light, including the lower portion of the infrared light spectrum, that are present but may be imperceptible to our eyes, and amplifying it to the point that we can easily observe the image.
Image Enhancement.
it penetrate unevenly in thick pieces of food (they don't make it all the way to the middle) and there are also "hotspots" caused by wave interference.
Microwaves
they widely used for point-to-point communications because their small wavelength allows conveniently-sized antennas to direct them in narrow beams, which can be pointed directly at the receiving antenna.
Microwaves
this is very useful in satellite communications. They are used for their smaller wavelength, which allows antennas to point them directly at a receiving antenna.
Microwaves
what are the best suited to communicate with geostationary satellites since they have a higher frequency and small wavelength.
Microwaves
With the proper night-vision equipment, you can see a person standing over 200 yards (183 m) away on a moonless, cloudy night.
Night Vision
it can block microwave communication, producing a condition called rain fade. To locate incoming storms, weather radar deliberately uses shorter-wavelength microwaves to increase interaction with rain.
rainstorm
it orbit 22,300 miles (35,880 kilometers)
satellite in stationary
They are not the best for communication with satellites in low orbit.
Microwaves
Ku band
12 to 18 GHz
K band
18 to 26.5 GHz
This is the wave frequency most commonly used in microwave ovens.
2,450 megahertz (2.45 gigahertz).
This feature makes it possible for different microwave equipment to use the same frequency but never
interfere with each other.
the radio waves penetrate the food and excite water and fat molecules pretty much evenly throughout the food.
microwave cooking
These waves are not absorbed by most plastics, glass or ceramics. Metal reflects microwaves, which is why metal pans don't work well in a microwave oven.
microwave ovens
this frequency are absorbed by water, fats and sugars. Once, absorbed, they're converted directly into atomic motion (heat).
microwave ovens
Ka band
26.5 to 40 GHz
Q band
33 to 50 GHz
C band
4 to 8 GHz
W band
75 to 110 GHz
X band
8-12 GHz
it can be easily broadcast and received via aerial antennas. Unlike radio waves, microwave signals can be focused by antennas just as a searchlight concentrates light into a narrow beam.
Microwaves
it refers to light waves of lower frequency than human eyes can receive and interpret.
Infrared (IR)
Wireless LAN protocols make use of microwaves.
Internet
most popular devices for generating microwaves; They produce microwaves of low power and require the use of an amplification device, such as a MASER (microwave amplification by stimulated emission of radiation).
Magnetrons and Klystrons
it is nearly 100 percent reliable
Microwave communication
it cook food in an amazingly short amount of time and are extremely efficient in their use of electricity because they only heat the food, not, theoretically, the microwave-safe container the food's in.
Microwave ovens
Microwaves are used for their smaller wavelength, which allows antennas to point them directly at a receiving antenna
Satellite communication
it emit microwaves with wavelengths between 1 and 10 cm.
Satellites
it is transmitted directly from a source to a receiver site. Reliable microwave signal range does not extend very far beyond the visible horizon.
Signals
This technology operates by capturing the upper portion of the infrared light spectrum, which is emitted as heat by objects instead of simply reflected as light.
Thermal Imaging.
it make use of infrared detection.
Vampire bats and several groups of insects
a more common method of microwave transmission
Waveguide
why The whole heating process is different?
because you are "exciting atoms" rather than "conducting heat".
it used to broadcast the 1964 Summer Olympics
first geostationary satellite
Some snakes are able to detect prey in total darkness without reliance on sight, olfaction or hearing, but with the help of a mysterious "sixth sense"- they can perceive infrared radiation.
infrared and Animals
it penetrate the food and excite water and fat molecules.
microwaves
what are the all sources of celestial gamma-rays.
neutron stars and pulsars, and black holes