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Ch 4 Section 1&2

Science Key Terms

TermDefinition
transparent material transmits most of the light that strikes it
translucent material scatters light as it passes through
opaque materials reflects or absorbs all of the light that strikes it
primary colors three colors that combine to make any other color
secondary colors two primary colors that combine in equal amounts
complementary colors any two colors that combine to make white light
pigments colored substances that are used to color other materials
ray light waves as straight lines
regular reflection when parallel rays of light hit a smooth surface
diffuse reflection when parallel rays of light hit a bumpy or uneven surface
plane mirror a flat sheet of glass
image a copy of an object formed by reflected waves of light
virtual image an upright image that forms where light seems to come from
concave mirror a mirror with a surface that curves inward
optical axis an imaginary line that divides in half
focal point the place at which rays parallel to the optical axis meet
real image when rays actually meet
convex mirror a mirror with a surface that curves outward
magenta, cyan, yellow examples of pigment colors
green, violet, orange examples of secondary colors
red, blue, green examples of primary colors
Created by: lkdickson
 

 



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