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BJU Physical Sci 22

BJU Physical Science Ch 22 6th edition

TermDefinition
additive color A color that is produced by combining the wavelengths of different colors.
concave mirror A curved mirror with the reflective side on the inside of the curve.
convex mirror A curved mirror with the reflective side on the outside of the curve.
diffuse reflection The reflection off a rough or uneven surface that reflects light rays in all directions.
focal point The point on an optical axis 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 lens or mirror to its focal point.
illuminated object An object that is visible because it reflects light from an external source.
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.
luminous object An object that is producing visible light.
opaque material A material through which visible light cannot pass.
plane mirror A flat mirror.
primary color One of the three colors (red, blue, and green) of visible light that the human eye can sense; mixed to produce other colors.
ray A model of light in which the end-point represents the light's source and the light travels in one direction.
real image An image that forms at the point where converging rays of light intersect.
reflected ray The ray that bounces off a surface.
secondary color A color of light that is produced when primary colors are mixed.
specular reflection Reflection that occurs when a smooth surface reflects light rays in mostly the same direction; also known as regular reflection.
subtractive color A color that forms because of pigments absorbing some wavelengths of light that strike an object.
translucent material A material through which light passes but the light is scattered and does not transmit a clear image.
transparent material A material through which light passes without scattering, transmitting a clear image.
virtual image An image produced by diverging rays. The image is formed at the point from which the diverging rays would have originated. Because the rays don't actually intersect, virtual images cannot be projected onto a screen.
Created by: marchscience
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