Physical Science - Chapter 22

Incandescence

the emission of light due to an objects temperature.

Phosphorescence

a slow emission of absorbed electromagnet energy, similar to fluorescence.

Ray

a model of light in which the endpoint represents the lights source and the light travels in one direction.

light rays

Diverging lens: a lens that causes ________ to separate (diverge); also known as concave lens.

Chemiluminescence

the emission of light energy from chemical reactions.

Fluorescence

the emission of light after an object absorbs high- energy electromagnetic waves.

Diffuse reflection

the reflection off a rough or uneven surface that reflects light rays in all directions.

Concave mirror

a curved mirror with the reflective side on the inside of the curve.

Lens

a disk of transparent material that refracts light to produce a real or virtual image.

Convex mirror

a curved mirror with the reflective side on the outside of the curve.

converging lens

a lens that causes light rays to come together (converge); also known as convex lens

luminous object

an object that is producing visible light

illuminated object

an object that is visible because it reflects light from an external source

incandescence

the emission of light due to an objects temperature

fluorescence

the emission of light after an object absorbs high-energy electromagnetic waves

phosphorescence

a slow emission of absorbed electromagnet energy, similar to fluorescence

chemiluminescence

the emission of light energy from chemical reactions

ray

a model of light in which the endpoint represents the lights source and the light travels in one direction

transparent material

a material through which light passes without scattering, transmitting a clear image

translucent material

a material through which light passes but the light is scatter and does not transmit a clear image

opaque material

a material through which visible light cannot pass

primary colors

one of the three colors (red, blue, and green) of visible light that the human eye can sense'; mixed to produce

secondary colors

a color of light that is produced when primary colors are mixed

additive color

a color that is produced by combining the wavelengths of different colors

subtractive color

a color that forms because of pigments absorbing some wavelengths of light that strike an object

diffuse reflection

the reflection off a rough or uneven surface that reflects light rays in all directions

reflected ray

the ray that bounces off a surface

incident ray

a light ray approaching a surface; an incoming ray

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

plane mirror

a flat mirror

virtual image

an image produced by diverging rays

real image

an image that forms at the point where converging rays of light

concave mirror

a curved mirror with the reflective side on the inside of the curve

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

focal length

the distance from the center of a ens or mirror to its focal point

convex mirror

a curved mirror with the reflective side on the outside of the curve

index of refraction

the ratio of the speed of light in a vacuum to the speed if light in the medium

lens

a disk of transparent material that refracts light to produce a real or virtual image

converging lens

a lens that causes light rays to come together (converge); also known as convex lens

diverging lens

a lens that causes light rays to separate (diverge); also known as concave lens

luminous object

an object that is producing visible light

illuminated object

an object that is visible because it reflects light from an external source

transparent material

a material through which light passes without scattering, transmitting a clear image

translucent material

a material through which light passes but the light is scatter and does not transmit a clear image

opaque material

a material through which visible light cannot pass

primary colors

one of the three colors (red, blue, and green) of visible light that the human eye can sense; mixed to produce

secondary colors

a color of light that is produced when primary colors are mixed

additive color

a color that is produced by combining the wavelengths of different colors

subtractive color

a color that forms because of pigments absorbing some wavelengths of light that strike an object

reflected ray

the ray that bounces off a surface

incident ray

a light ray approaching a surface; an incoming ray

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

plane mirror

a flat mirror

virtual image

an image produced by diverging rays

real image

an image that forms at the point where converging rays of light

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

focal length

the distance from the center of a ens or mirror to its focal point

index of refraction

the ratio of the speed of light in a vacuum to the speed if light in the medium

converging lens

a lens that causes light rays to come together (converge); also known as convex lens

diverging lens

a lens that causes light rays to separate (diverge); also known as concave lens