: Electromagnetic waves are carried from one point to the other by many means such as coaxial cable, two wire line, optical fiber, microstrip lines, waveguide etc. Waveguides are specialized hollow metallic structures used to guide electromagnetic waves from one point to another. They are widely ...
一、First of all,the use of mobile phone is harmful to health.Electromagnetic waves alter [electric activity of the brain] and cause disturbance in sleep 1.It also causes difficulty in concentration,fatigue,and headache [2]; and increase reaction time in a time-dependent manner [3].They incr...
一、First of all,the use of mobile phone is harmful to health.Electromagnetic waves alter [electric activity of the brain] and cause disturbance in sleep 1.It also causes difficulty in concentration,fatigue,and headache [2]; and increase reaction time in a time-dependent manner [3].They incr...
THz wavelengths range from 1 mm to 0.1 mm. As THz radiation begins at wavelength of 1 mm and goes less than 1 mm, it is known as submillimeter band. This frequency band is also called as T-rays, T-waves, T-lux, T-light etc. The terahertz frequencies find applications in spectroscopy...
Radiant energy basically encompasses all energy that is found in electromagnetic waves.Advantages of radiant energyinclude: it is relatively cheap to set up and it is easy to use on a small scale. The main disadvantage of radiant energy is not efficient for large amounts of energy. ...
Radio frequency identification (RFID) is the generic name for technologies that use radio waves to automatically identify individual items that carry such ... P Jones,C Clarke-Hill,P Shears,... - 《International Journal of Retail & Distribution Management》 被引量: 296发表: 2004年 RFID systems...
This process begins with light from an incandescent illumination source passing through a polarizing filter placed between the light source and the condenser. This orients the light waves in one direction so the electromagnetic waves oscillate in only one plane. ...
A photon is a speck of energy that comes from the sun. Many photons band together to form electromagnetic waves, which are waves of energy that move toward the Earth and provide heat and light. Solar energy is a type of radiant energy that travels in waves from the sun to other parts ...
electromagnetic waves like IR, RF, satellite, etc. In the present day, wireless communication technology refers to a variety of wireless communication devices and technologies ranging from smartphones to computers, tabs, laptops,Bluetooth Technology, printers. This article gives an overview of wireless...
of the ground. This form of measurement allows seismologists to measure and map the specific area of the motion and to determine the proportions of these seismic waves, “To detect very weak earthquakes or a great earthquake that has occurred in another part of the world, most seismographs ...