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physical science
| Term | Definition |
|---|---|
| waves | oscillations that carry energy |
| oscillation | an up and down or back and forth motion |
| vacuum | space that has no matter in it. |
| mechanical waves | waves that move through matter |
| types of mechanical waves | waves in water created from the back of a speedboat talking creates sound waves which travel by transferring vibrations from molecule to molecule |
| electromagnetic waves | waves that move through vacuums |
| types of electromagnetic waves | radio, interfered, x rays |
| wave properties | amplitude, frequency, period, wavelength, speed, and phase. |
| amplitude | the angular distance of a celestial object from the true east or west point of the horizon at rising or setting. |
| crest | A crest is the point on a wave with the maximum value of upward displacement within a cycle. |
| trough | the minimum or lowest point in a wave |
| resting point | Rest Point is the point at which the beam would come to rest |
| wavelength and symbol | the Greek letter lamba |
| wavelength units | hertz |
| 3 ways the measure wavelengths | crest to crest, trough to trough, and frequency |
| frequency | number of waves that pass through a fixed point |
| units of frequency | hertz |
| wave speed | a wave to move from on point to another |
| wave speed units | meters per second |
| wave speed equation | wave speed = frequency x wavelength |
| medium | waves travel at different speeds |
| reflection | wave bonces off a surface |
| law of reflection | waves get reflected in a particular way |
| reflected ray | bonce off at 90% |
| incident ray | when a ray moves toward a wall at 90% |
| refraction | the bending of waves through mediums |
| diffraction | bending of waves through a barrier |
| interference | waves colliding together |
| constructive interference | colliding waves coming together as one big one |
| destructive interference | interference with each other to cancel each other out |
| absorption | energy from one wave to another |
| absorbed colors | colored waves |
| reflected colors | waves reflected |
| electromagnetic spectrum (know the order and be able to describe each) | transverse, electromagnetic waves |
| visible light spectrum | only electromagnetic wave we can see |
| longitudinal wave | a wave vibrating in the direction of propagation. |
| expansion | the action of becoming larger or more extensive. |
| compression | the action of compressing or being compressed. |
| intensity (of sound) | the measurable amount of a property, such as force, brightness, or a magnetic field. |
| units of sound | decibels |
| pitch | the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone. |
| analog signal | is any continuous signal for which the time-varying feature |
| digital signal | is a signal that is being used to represent data as a sequence of discrete values; at any given time it can only take on one of a finite number of values. |
Created by:
2022alst
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