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Chapter 16 Vocab

physical science

TermDefinition
virtual image cannot be projected on screen; an image formed by diverging light rays that is perceived by the brain, even though the light rays do not actually originate from the place where the image appears to be located
real image can be projected on a screen; an image that appears at a certain location as a result of rays of light converging at that location
ultrasound sound waves with frequency above 20,000 Hz; cannot be heard by humans
infrasound slow vibrations of frequencies lower than 20 Hz
pitch perception of how high or low a sound is; related to the frequency of the sound waves
sound wave a longitudinal wave that is cause by vibrations and that travels through material medium
intensity amount of energy that flows through a certain area in a specific amount of time
photon unit of light; massless energy containing particle that electromagnetic waves sometimes behave like; the frequency of the electromagnetic wave increases with the energy of the particle
sonar a system that uses the reflection of sound waves to detect objects underwater
resonance the process by which an object is made to vibrate by absorbing energy at its natural frequencies
dispersion in optics, the process of separating a wave (such as white light) of different frequencies into its individual component waves (the different colors)
prism in optics, a system that consists of two or more plane surfaces of a transparent solid at an angle with each other
magnification the increase of an object's apparent size by using lenses or mirrors
lens a transparent object that refracts light waves such that they converge or diverge to create an image
light ray a line in space that matches the direction of the flow of radiant energy
radar radio detection and ranging, a system that uses reflected radio waves to determine the velocity and location of objects
Created by: hmcelreath
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