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Chitose Institute of Science and Technology, Hokkaido, Japan

16-09-28 19:53
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The word "Photonics" comes from the elementary particle "Photon", which is a quanta of energy equivalent to hν, where h is the Planck's constant (6.6x10-34 J•sec) and hν is the frequency (Hertz) of light. So "Photonics" can be understood as the study of the particle called the "Photon".
The Milky Way "Photons" are present all around us, and because of their reflection or absorption we can see objects. "Photons" have no rest mass and they travel with the speed of light (3x108 m/sec in vacuum), in their propagation they exhibit wave like characteristics. These particles show electro-magnetic behavior i.e. a photon is associated with an electric component and a magnetic component which are perpendicular to each other and are mutually orthogonal to the direction of propagation.
In nature, the biggest sources of photons are the stars (The Milky Way), and in our solar system, it's the sun. The human eye can see only a fraction of the whole spectrum, namely the visible spectrum (400-800nm). Most of the radiation we see is polychromatic (contains many frequencies), the incandescent lamp or the fluorescent tube are some examples.

경기도 안산시 상록구 사3동 한양대학교 제2과학기술관 602호
Room 602, Science & Technology Building II, Hanyang University, Ansan, Gyeonggi
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