Our world is visual, a gourmet meal, a movie or a sport spectacle. There is, however, a silent mysterious invisible world, behind the scene,that we do not see.
Solar Wavelength & Energy
Human Light vision has evolved to see only 40% of the energy coming from the sun. Human eyes respond to the middle range of frequencies showing showing us a range of colors similar to a rainbow. Higher frequency ultraviolet rays carry enough energy that would damage eye retinas and other biological cells; we avoid them. Lower frequency rays in the infrared range do not carry the energy required for eye retina response; we do not see them; they do deliver heat to warm us. How do you visualize things and behavior that you cannot see? Humans are creative with imagination and deduction based on experience. Also, mathematics and experiments are used to expand scientific knowledge about the invisible world. Einstein's famous equation relating energy and matter was the result of mathematical inquiry, to be later confirmed by the expansion nuclear energy and power. Electrons and atoms are invisible but yet there are useful reality confirmed by experiment and experience.
Sunlight and Vision
Solar energy in Beautiful Color frequencies
Our eyes are design tuned to detect the sunlight frequencies. The images we see could be viewed as the result of colliding photons, some transmit through matter, like glass, some are absorbed and some are reflected. Our eyes and brain responds to show us the objects encountered, with colors that depend on the light wavelength. Photon energy in the visible light range is about 2 electron volts (ev). One energy ev of is extremely small; the kinetic energy of flying mosquito requires a trillion ev.
High energy waves like gamma rays and x-rays are also produced by the solar fusion process but they don't make it out to the sun's surface except sometimes as solar flares. Fortunately, the magnetic field around the earth provides a barrier to high-energy particles. Otherwise, these rays which could damage all living cells fatally.
Wireless Communication
Marconi delivers first radio message
Marconi delivered the first wireless message across the Atlantic in 1901. Tody's wireless is based on using radio waves to transmit data invisibly over distances. Oscillating electrons at a specified frequency in an antenna can broadcast radio and television. Electromagnetic waves with data that can be picked up by a receiving antenna and then can be processed by electronic circuitry to produce sound and video. Tihe carrer signal, which has informational data embedded on it, acts like the postman in receiving and delivering mail. The phenomena can provide the transfer of information between a phone and a central receiver; the receiver can be inside the home for a cordless phone or an outside on tower for today's cell phone.
"This is a smart TV
The Internet is simply an array of world wide computers connected to each other. Computers are the critical elements for generating and saving information. More importantly, it is how the information can be communicated to other computers and related devices around the world.Creativity with electron energy technology has resulted in a lifetime of comfort and leisure for us in today's modern world. Today human economic activity is based on electronic devices that carry information and data for television, radio and phones.
Internet Communication
smart phone Internet programs
Without the complex network of communication, computer activity would be localized. The Internet started in the 1950s with university research computers being connected through a wired network. UCLA sent the first message to Stamford Research Institute in 1959. Today the net is gigantic, commercial and worldwide. The internet computers are connected by cable, wires, fiber optics and wireless; the paths can be the air, the ground and even in outer space, using satellites. Radio analog signals are still important in connecting devices through the air and space but now it's packets of digital data traveling on the carrier radio waves. Fiber optics is also used, wherein pulses of light travel through optical fibers. The light pulses are generated by lasers and light emitting diodes
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