Light is a kind of radiant energy or radiation that can transmitirese by the vacuum. These radiations are waves (electromagnetic) that can have different frequencies. The higher the frequency the more energy.
In the bottom of the image electromagnetic waves would be found less often and less energy and in the upper electromagnetic waves more frequent, more energetic and more dangerous for living beings.
PROPERTIES OF LIGHT
Light proaga straight. We define a ray of light as the line that represents fragic direction and the direction of propagation of light.
shadows and penumbras
Shadow occurs when an opaque object interposed in the path of light. This object will not pass light to form a dark silhouette on the plane that projects light. The shadow represents the silhouette of the object.
If the light source is large and close to the object is produced shadows and penumbras. The penumbra is the area where the light comes from one end of the outbreak but not the other.
REFLECTION OF LIGHT
REFRACTION OF LIGHT LENSES
COLOR White light is actually a mixture of electromagnetic radiation with different frequencies we perceive as different colored lights.
When light hits an object, part of the radiation in the mixture can be absorbed so as to reflect the rest. These are the color of the body.
WORKSHOP ON THE COLOR
LIGHT ON WIKIPEDIA
CONSTRUCTION OF OPTICAL INSTRUMENTS
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