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Light Packet vocab words
Mr. Hobbs Vocab Words for final
10
Science
7th Grade
06/13/2010

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Term
Electromagnetic spectrum
Definition
a complete range or electromagnetic waves placed in order of increasing frequency, this spectrum is made up of radio waves, infarred waves, visible light, ultraviolet rays, X- rays and gamma rays
Term
Electromagnetic Wave
Definition
this type of wave transfers electrical and magnetic energy. this wave is consisted of vibrating electric and magnetic field that move through space at the speed of light 
Term
Transparent
Definition
this type of material transmits most of the light that strikes through it, when light hits the particles of a transparent material, the particles absorb it but then reemit it or send it back out, until the light finally passes through to the other side
Term
Translucent 
Definition
material that scatters light that passes through, just as smoke, fog and clouds scatter light as it passes through the air 
Term
Opaque 
Definition
material that reflects or absorbs all of the light that strikes it.
Term
Reflection
Definition
when an object or wave bounces back off a surface through which it cannot pass
Term
Refraction 
Definition
when light enters a new medium prependicular to the boundary, it will keep moving in the same direction. But if it hits the boundary at an angle  it will also bend and change speed
Term
Cornea
Definition
light enters the eye through the transparent front surface 
Term
Pupil
Definition
an opening through which light enters the inside of the eye 
Term
Retina 
Definition
a layer of cells that lines the inside of the eyeball 
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