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50 Cards in this Set
- Front
- Back
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What is a material that REFLECTS OR ABSORBS aLL OF THE LIGHT that strikes it?
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opaque- like a door
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A material that TRANSMITS LIGHT!
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Transparent like a window
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A material that ALLOWS SOME LIGHT TO PASS THROUGH is called?
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Translucent- like a frosted glass
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What is REGULAR REFLECTION?
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when parallel rays of light hit a smooth surface. all rays are reflected at same angle like a reflection on a mirror
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What are straight lines used to represent light waves that show how light travels.
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RAYS
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WHEN PARALLEL RAYS OF LIGHT HIT A BUMPY OR UNEVEN SURFACE IT IS CALLED WHAT?
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DIFFUSE REFLECTION
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In diffuse reflection what is happening with the light?
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Light is scattered as each ray is reflected back at a different angle. Like reflection off of rippled water
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What is a copy of an object formed by reflection or refracted rays of light?
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IMAGE
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What KIND OF MIRROR always produces a right-side up or virtual image?
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PLANE MIRROR OR FLAT MIRROR
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What does "virtual" describe?
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something that you can see but doesn't really exist
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A mirror with a surface that curves inward is a _____ mirror?
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CONCAVE -helps to remind yourself it is like a spoon
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Real images are __ -___ ___.
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up- side down
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Convex mirrors are mirrors with a surface that curves _________.
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Outward curve like a spoon's side that you don't eat from.
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Real images are always ___-____ ____
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up-side down
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Images formed by convex mirrors are always ______ images?
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virtual
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Refraction of light is when light rays enter a new medium at an ___1__ , the change in speed cause them to ___2___ or change __3____
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1. angle
2.bend 3. direction |
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In a prism when a white light enters the prism, what happens?
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Each wavelength is refracted by a different amount.
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When the wavelengths in a prism are refracted by different amounts what happens?
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this separates the colors of the visual light spectrum.
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When droplets f water act like tiny prisms, causing the white light to be separated into spectrum colors you have formed what?
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a RAINBOW
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AN IMAGE OF A DISTANT OBJECT CAUSE BY REFRACTION OF LIGHT IS WHAT?
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A MIRAGE
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Which lens is thinner in the center than the edges.
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CONCAVE
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Which lenses produces a virtual image?
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CONCAVE because parallel light rays are bent away from center
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Which lenses are thicker in the center than at the edges?
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CONVEX
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The convex lense acts more like a ____ ____.
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MAGNIFYING GLASS
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Objects in ____ light reflect some colors and absorb other
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WHITE
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White OBJECTS DO WHAT?
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reflect all the wavelengths of the color spectrum
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BLACK objects do what?
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absorb all the light
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How do you form any color you would like?
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by mixing colors of the spectrum in different amounts
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What are the three colors that are used to make any other color?
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PRIMARY COLORS
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When two primary colors are used in equal amounts are mixed it is called a what?
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SECONDARY COLOR
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What are the primary colors of LIGHT?
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RED, GREEN AND BLUE
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When mixed in equal amounts the primary LIGHT COLORS equal what ?
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white light
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Mixing pigments is ____ than mixing colors of light.
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different
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Mixing the primary colors of pigments will result in what color?
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black
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You are able to see because why?
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a series of steps that imvolve the structures of the eye and the brain
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What is the transparent front part of the surface of the eye where light enters is called.
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Cornea
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The Iris is what part of the eye and what is its function?
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It is the colored part of the eye.
a ring of muscle that contracts and expand to change the amount of light entering the eye |
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Which part of the eye is black in the center of the iris?
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the pupil where light enters
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What do we call the layer of cells that line the inside of eyeball?
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CORNEA
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The cornea and the lens _____ light and an upside down image forms on the ____
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refract
retina |
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The lens behind the cornea of the eye is what kind of a lens?
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CONVEX LENS
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Which part of the eye are used to see black, white and shades of gray?
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RODS
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Name three characteristics of cones?
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only functions in bright light
three types of cones Each detect 1 of primary colors of light |
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What carries signals generated by the rods and cones to the brain?
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OPTIC NERVE
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What conditions cause you to see nearby things, but distant objects are blurry?
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NEARSIDEDNESS
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What condition is where you can see distant things but neary objects are blurry?
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FARSIDEDNESS
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TELESCOPES USE WHAT?
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optical telescopes use light and lenses or mirrors to collect and ficus light from distant objects
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REFRACTING TELESCOPES USE WHAT?
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TWO CONVEX LENSES
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Reflecting telescopes use what?
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A LARGE CONCAVE MIRROR
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HOW DO MICROSCOPES MAGNIFY THINGS?
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They use a combination of lenses to magnify images
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