Physical Science - Chapter 22
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60 Terms
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Incandescence
the emission of light due to an objects temperature.
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Phosphorescence
a slow emission of absorbed electromagnet energy, similar to fluorescence.
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Ray
a model of light in which the endpoint represents the lights source and the light travels in one direction.
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light rays
Diverging lens: a lens that causes ________ to separate (diverge); also known as concave lens.
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Chemiluminescence
the emission of light energy from chemical reactions.
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Fluorescence
the emission of light after an object absorbs high- energy electromagnetic waves.
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Diffuse reflection
the reflection off a rough or uneven surface that reflects light rays in all directions.
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Concave mirror
a curved mirror with the reflective side on the inside of the curve.
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Lens
a disk of transparent material that refracts light to produce a real or virtual image.
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Convex mirror
a curved mirror with the reflective side on the outside of the curve.
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converging lens
a lens that causes light rays to come together (converge); also known as convex lens
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luminous object
an object that is producing visible light
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illuminated object
an object that is visible because it reflects light from an external source
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incandescence
the emission of light due to an objects temperature
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fluorescence
the emission of light after an object absorbs high-energy electromagnetic waves
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phosphorescence
a slow emission of absorbed electromagnet energy, similar to fluorescence
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chemiluminescence
the emission of light energy from chemical reactions
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ray
a model of light in which the endpoint represents the lights source and the light travels in one direction
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transparent material
a material through which light passes without scattering, transmitting a clear image
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translucent material
a material through which light passes but the light is scatter and does not transmit a clear image
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opaque material
a material through which visible light cannot pass
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primary colors
one of the three colors (red, blue, and green) of visible light that the human eye can sense'; mixed to produce
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secondary colors
a color of light that is produced when primary colors are mixed
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additive color
a color that is produced by combining the wavelengths of different colors
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subtractive color
a color that forms because of pigments absorbing some wavelengths of light that strike an object
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diffuse reflection
the reflection off a rough or uneven surface that reflects light rays in all directions
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reflected ray
the ray that bounces off a surface
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incident ray
a light ray approaching a surface; an incoming ray
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law of reflection
the law that states that when a light ray reflects off a surface, the angle of the incident ray equals the angle of the reflected ray
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plane mirror
a flat mirror
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virtual image
an image produced by diverging rays
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real image
an image that forms at the point where converging rays of light
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concave mirror
a curved mirror with the reflective side on the inside of the curve
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focal point
the point on an optical axel at which all reflected or refracted light rays from incident rays that are parallel to the optical axis converge
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focal length
the distance from the center of a ens or mirror to its focal point
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convex mirror
a curved mirror with the reflective side on the outside of the curve
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index of refraction
the ratio of the speed of light in a vacuum to the speed if light in the medium
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lens
a disk of transparent material that refracts light to produce a real or virtual image
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converging lens
a lens that causes light rays to come together (converge); also known as convex lens
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diverging lens
a lens that causes light rays to separate (diverge); also known as concave lens
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luminous object
an object that is producing visible light
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illuminated object
an object that is visible because it reflects light from an external source
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transparent material
a material through which light passes without scattering, transmitting a clear image
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translucent material
a material through which light passes but the light is scatter and does not transmit a clear image
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opaque material
a material through which visible light cannot pass
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primary colors
one of the three colors (red, blue, and green) of visible light that the human eye can sense; mixed to produce
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secondary colors
a color of light that is produced when primary colors are mixed
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additive color
a color that is produced by combining the wavelengths of different colors
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subtractive color
a color that forms because of pigments absorbing some wavelengths of light that strike an object
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reflected ray
the ray that bounces off a surface
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incident ray
a light ray approaching a surface; an incoming ray
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law of reflection
the law that states that when a light ray reflects off a surface, the angle of the incident ray equals the angle of the reflected ray
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plane mirror
a flat mirror
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virtual image
an image produced by diverging rays
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real image
an image that forms at the point where converging rays of light
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focal point
the point on an optical axel at which all reflected or refracted light rays from incident rays that are parallel to the optical axis converge
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focal length
the distance from the center of a ens or mirror to its focal point
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index of refraction
the ratio of the speed of light in a vacuum to the speed if light in the medium
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converging lens
a lens that causes light rays to come together (converge); also known as convex lens
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diverging lens
a lens that causes light rays to separate (diverge); also known as concave lens
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