Light travels in straight lines and bounces off a mirror much like a ball bouncing off a wall. No one has actually seen particles of light. Even now it's easy to explain why that might be. The particles could be too small, or moving too fast, to be seen, or perhaps our eyes see right through them.

Light waves act like a wave instead of a stream of particles. When light passes through a very narrow opening, it can spread out, and interfere with light passing through another opening. If light were a stream of particles, this additional light would not have been there. This suggests that light spreads out like a wave. In fact, a beam of light radiates outward at all times.

Albert Einstein advanced the theory of light further. Einstein considered the photoelectric effect, in which ultraviolet light hits a surface and causes electrons to be emitted from the surface. Einstein's explanation for this was that light was made up of a stream of energy packets called photons.

Producing a Photon

Any light that you see is made up of a collection of one or more photons propagating through space as electromagnetic waves. In total darkness, our eyes are actually able to sense single photons, but generally what we see in our daily lives comes to us in the form of zillions of photons produced by light sources and reflected off from objects.Your eyes absorb some of the photons flowing through , and that is what one sees.

There are many different ways to produce photons, but all of them use the same mechanism inside an atom to do it. This mechanism involves the energizing of electrons orbiting each atom's nucleus. Nuclear Radiation Works describes protons, neutrons and electrons in some detail.

Electrons circle the nucleus in fixed orbits. An electron has a natural orbit that it occupies,
but if you energize an atom you can move its electrons to higher orbitals. A photon of light
is produced whenever an electron in a higher-than-normal orbit falls back to its normal orbit.

During the fall from high-energy to normal-energy, the electron emits a photon
a packet of energy with very specific characteristics. The photon has a
frequency, or color, that exactly matches the distance the electron falls.

Probably the most common way to energize atoms is with heat, and this is the basis of incandescence. Red is the lowest-energy visible light, so in a red-hot object the atoms are just getting enough energy to begin emitting light that we can see. Once you apply enough heat to cause white light, you are energizing so many different electrons in so many different ways that all of the colors are being generated they all mix together to look white

Making Colors: Visible light is light that can be perceived by the human eye.The visible light of the sun, appears to be colorless, which we call white.White is not considered to be part of the visible spectrum . This is because white light is not the light of a single color, or frequency. Instead, it is made up of many color frequencies. White light is a mixture of all of the colors of the visible spectrum. The combination of every color in the visible spectrum produces a light that is colorless, or white.

When Light Hits an Objec:t When a light wave hits an object, what happens to it depends on the energy of the light wave, the natural frequency at which electrons vibrate in the material and the strength with which the atoms in the material hold on to their electrons. Based on these three factors, four different things can happen when light hits an object:

The waves can be reflected or scattered off the object.(Wasting Energies?)
The waves can be absorbed by the object.(Building Bridges,Antakaarna?)
The waves can be refracted through the object.(Changing Sructures?)
The waves can pass through the object with no effect

A reflected wave always comes off the surface of a material at an angle equal to the angle at which the incoming wave hit the surface. In physics, this is called the Law of Reflectance. Think of the Earth's atmosphere as a surface, but it nonetheless is "rough" to incoming white light. The atmosphere contains molecules of many different sizes, including nitrogen, oxygen, water vapor and various pollutants. This assortment scatters the higher energy light waves, the ones we see as blue light.

Everything is affected by, the nature of light. Light is a form of energy that travels in waves. We are attuned to those wave frequencies that we call visible light. Could we be attuned to those waves that are invisible, or are we seeing the invisble and are not aware?
What would make us aware? Is the answer in building our Antaakarna ?

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