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Science - Chapter 12 Les. 4 Vocab
Light
28
Science
4th Grade
04/09/2012

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Term
spectrum
Definition
a range of light waves w/ dif. wavelengths
Term
label parts of eye in order
Definition
cornea, pupil, lens, retina
Term
refraction
Definition
the bending of light
Term
uses of lasers
Definition
Cut thru metal, do surgery, scan bar codes, etc.
Term
convex
Definition
lens that bulges in middle
Term
pupil
Definition
black spot in center of eye
Term
uses of light pipes/optical fibers
Definition
Carry info. over phone and internet
Term
retina
Definition
tissue that covers back of eye
Term
mnemonic device to remember the order of the parts of the eye
Definition
(CPLR) – Catch the Ponies Leaving the Ranch!
Term
transparent
Definition
material that lets light pass thru
Term
light pipes/optical fibers
Definition
optical fibers made of glass or plastic that carry light
Term
cornea
Definition
thin, clear tissue covering eye
Term
electromagnetic spectrum
Definition
all light waves and includes the visible spectrum, too (radio waves, microwaves, infrared waves, ultraviolet waves, X-rays, gamma waves)
Term
wavelength
Definition
the distance from the top of one wave to the top of the next
Term
concave
Definition
lens that curves inward
Term
reflection
Definition
the bouncing of light waves off a surface
Term
the color white
Definition
reflects all wavelengths & is made up of all colors
Term
translucent
Definition
reflects some light and lets some pass thru
Term
examples of opaque objects
Definition
wood, metal, animals, some types of plastic (solid color)
Term
visible spectrum
Definition
7 colors that make up white light that we can SEE
Term
examples of transparent objects
Definition
glass, water, some types of plastic (clear)
Term
prism
Definition
obj. that separates white light into the colors that make it up
Term
examples of translucent objects
Definition
some types of plastic (cloudy)
Term
rays
Definition
straight lines in which light travels
Term
opaque
Definition
material that blocks light
Term
the color black
Definition
absorbs all wavelengths
Term
lenses
Definition
tools that refract light
Term
lasers
Definition
tubes of gas that use elec. to beam light
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