Light Paper

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Light is a kind of electromagnetic radiation. It is made up of vibrations between a certain group of frequencies. When light is given off from a source it spreads out over a larger area. Scientists are still dumbfounded by exactly what light is.

When light hits a smooth or polished surface it "bounces" off at the same angle that it hit. Reflecting telescopes are made of concave mirrors and they have helped astronomers chart the universe because the mirrors interact with each other to magnify what is being observed.

Refraction is when light bends as it goes through glass, water and other transparent objects that are denser than air. A prism is an instrument that spreads out a ray of light into the color spectrum. A lens
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Another way

light acts as particles is that atoms absorb photons and are given

energy. Then the excited atom gives off another photon in return for

the photon that it was given.

The Dutch mathematician, astronomer, and physicist, Christiaan

Huygens countered Newton with the wave theory. He figured he could

prove Newton wrong because if photons were drawn towards water

and other dense materials, its velocity would become greater because the force of being pulled would speed it up. And it was proven that light slowed down when it went through such materials. But Huygens still couldn’t explain how a light wave could give atoms energy, or how photons couldn’t.

Now scientists believe that the two theories complement each other. As a result the quantum theory came into being. The quantum theory says that in some ways light acts as a series of particles and in other ways acts as a wave.

The French physicist Armand Hippolyte Louis Fizeau was the first person to successfully measure the speed of light. The speed of light is 186,282.396 miles per second in a vacuum such as space. The speed of light is 3% less in air than in a vacuum; water is about 25 percent less, and in glass is 33%.

Reflection

As discussed at the beginning: when light hits a flat,

smooth/polished surface it "bounces" back at the same angle that it hit.

The ray that the light hits

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