The range of wavelengths or frequencies over which electromagnetic radiation extends.
Allowing light to pass through so that objects behind can be distinctly seen.
Not able to be seen through; not transparent.
Allowing light, but not detailed images, to pass through; semitransparent.
The lowest point the medium sinks to.
The highest point the medium rises to.
A region in a longitudinal wave where the particles are closest together.
A region in a longitudinal wave where the particles are furthest apart.
Characterized by wavelength, frequency, and the speed at which they move.
The movement of energy through substances in longitudinal (compression/rarefaction) waves
A sound is determined by the rate of vibration, or frequency, of the sound wave.
The maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position
A unit used to express the intensity of a sound wave.
A wave that oscillates perpendicular to the axis along which the wave travels
A wave that oscillates back and forth on an axis that is the same as the axis along which the wave propagates.
A change of direction that light undergoes when it enters a medium with a different density from the one through which it has been traveling
A process by which a wave hits an object and bounces off it.
The bending and spreading of a wave, such as a light wave, around the edge of an object.
A disturbance that travels through a medium, transporting energy from one location to another location without transporting matter.
A repetition of sound produced by the reflection of sound waves from a wall, mountain, or other obstructing surface.
A physiological process for locating distant or invisible objects by sound waves reflected back to the emitter from the objects.
The force that attracts a body toward the center of the earth, or toward any other physical body having mass.
A form of energy resulting from the existence of charged particles, either statically as an accumulation of charge or dynamically as a current.
A physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.
A magnet that retains its magnetic properties in the absence of an inducing field or current.
A magnet which retains its magnetism for brief periods.
A soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
Electromotive force or potential difference expressed in volts.
Each of the points near the extremities of the axis of rotation of the earth or another celestial body where a magnetic needle dips vertically(Plural).
An instrument containing a magnetized pointer that shows the direction of magnetic north and bearings from it.
A stationary electric charge, typically produced by friction, that causes sparks or crackling or the attraction of dust or hair.
A cylindrical coil of wire acting as a magnet when carrying electric current.
An electrical machine that converts electrical energy into mechanical energy.
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