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NASA - Tour of the Electromagnetic Spectrum

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when light moves through a a material, it travels in straigth lines . when light rays move from one material to another, the rays may bounce or bend. reflection occurs when light bounces off a suface . refraction happens when light bends while crossing g   a surfaceor moving through material. when you look in a mirrior, objects that are in front of you appear as if they are behing the mirror. light from the object strikes the mirror  and reflects  to your eyes.

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The subtractive color process if often called CMYK for the four pigments it uses. CMYK stand for cyan, magenta,yellow , and black. the letter K stands fior black because the letter  B is used for the color bluein RGB. color printers and photographs use CMYK

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light inters your eyes through the lens then on the r tina. onthe  surface of the retina are light -sensitive cells. when light hits a photoreceptor cell, the cell releases a chemical signal that travels along the optic nerve to the brain. in the brain the signal is translated intoo perception of color.

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you can see that visible light  is a small group

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The electronmagtic waves  include radio waves, microiwaves,infared light, ultraviolet light, x-ray, and gamma rays.

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The frequency of light is very high. for example, red light has a frequency of 460 trillion

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the speed at which light travelsthroughair is about 300 million meters per second. light is so d=fast it can travel around earth 7.5 times in ine second

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color is how we perceive the energy of light. all of the color in the the rainbow ave different energies. red light is the lwest  and violet is has the higher energy.

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when allthe  colors in the rain bow are conbine we see light without color. whe call the combination of all colors white light.

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travels extremely fast and over long distances.

carries energy and information

travels in straight lines

bounces and bends   when it comes with objects

has color

has different intensities  and can be bright or dim

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Light like sound and heat are forms of energy.
n order to get light out of an atom,you  must first put someenrgy into the atom

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A frequency spectrum is a graph that shows the amplitudes of different  frequencies  present in sound. Amplitude or loudness, is represented on the y-axis, and frequency is shown on the x-axis. a somogram shows on the verlical axis and time on the horizontal axis. The loudness is shown by a color range.

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Electromagnetic waves are waves which can travel through the vacuum of outer space. Mechanical waves, unlike electromagnetic waves, require the presence of a material medium in order to transport their energy from one location to another. Sound waves are examples of mechanical waves while light waves are examples of electromagnetic waves.

Electromagnetic waves are created by the vibration of an electric charge. This vibration creates a wave which has both an electric and a magnetic component.