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Light Unit

TermDefinition
reflection caused when a wave bounces off a barrier.
refraction caused when a wave bends as it moves through a different medium
The eye is shaped like a Convex Lens
microscope piece of equipment that uses 2 convex lenses to magnify a small object
image a copy of an object formed by reflected or refracted rays of light
focal point distance between the lens and the focal point
opaque an object that blocks light and forms a shadow - shade
transparent an object that allows light to pass completely through - window
translucent a material that transmits some light - stained glass
cones cells that allow humans to see visible light - color and detailed shapes
luminous an object that produces or gives off its own light
illuminated an object reflects light
rods cells in the eye that are sensitive to dim light - useful for night vision
dispersion when a prism breaks up white light into a band of colors
diffuse reflection a reflection that forms a fuzzy image
regular reflection a reflection that forms a clear image
pupil black opening that light enters the eye through
iris colored part of the eye controls the amount of light entering
retina converts the image into electrical impulses
lens shaped like a convex lens - refracts the light as it enters the pupil
cornea clear layer of the eye that protects it from dirt and bacteria
convex lens curve outward - rays are refracted toward each other - images appear larger
concave lens curve inward - rays are bent away from the lens - images appear smaller
nearsightedness easily see objects that are close up but not far away - corrected with CONCAVE lens
farsightedness easily see objects far away but not close up - corrected with CONVEX lens
Created by: cbeltrani