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GR8-Test 4


Wavelength The distance from any point on a wave to an identical point on the next wave.
Amplitude The maximum distance particles vibrate to their highest position in a wave.
Refraction The bending of a light wave as it passes between two substances and changes the speed of a wave. (Ex. light going into a curved lens)
Opaque An object that is not transparent or translucent and light does not pass through at all
Scattering The interaction of light with matter that causes light to change energy, direction, or both. (Ex. Sunlight shining on water)
Concave Lens A lens that is thinner in the middle than the edges; makes objects appear farther away and smaller
Convex Lens A type of lens that in thicker in the middle than the edges and curves outward; makes objects appear larger and closer
Interference A combination of two or more waves that results form a single wave; it can cause television or radio waves to become scrambled.
Lens A transparent objects that refracts light waves; can cause the light waves to come closer together or move farther apart.
Wave A periodic disturbance in a solid, liquid, or gas as energy moves through matter; all energy moves this way
Doppler Effect An observed change in the frequency of a wave when the source or observer is moving.
Diffraction The change in direction of a wave when a wave finds an obstacle or edge
Analog Signal A signal whose properties change continuously in a given range.
Digital Signal A signal that can be represented as a sequence of discrete values or 1's and 0's used by computers
Laser A device that only produces light of one wavelength
Electromagnetic Wave A wave that consists of electric and magnetic fields that vibrate at right angles to one another
Longitudinal Wave A wave in which the particles vibrate parallel to one another or move back and forth
Standing Wave A pattern of vibrations that simulates a wave standing still
Transverse Wave A wave in which the particles move perpendicular or side to side as the wave is moving
Medium A physical environment in which things happen; can be air, water, or a solid object
Gravity The force that attracts a body towards the center of the earth
Drag Resistance by friction from air or water moving over a surface
Free Fall The condition of unrestrained motion in a gravitational feild
Inertia An object's resistance to change in motion
Lift A upward force acting on an object
Net Force the resulting force determined by combining all of the forces acting on an object
Projectile Motion an object upon which the only force acting is gravity
Terminal Velocity Consistent speed attained by a body while falling
Weight The force of gravity on an object
Created by: s.taboada