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Vibrations and Waves
Sound
Light
Color and Refraction
Lenses and Diffraction
100
The time required for a wave to complete one cycle.
What is the period.
100
The frequency that an object vibrates at when it is struck or disturbed.
What is the natural frequency.
100
These are massless bundles of light which act much like particles.
What are photons.
100
These are the primary additive colors.
What are red, blue and green.
100
The shape of a converging lens, or of a diverging mirror.
What is convex.
200
The distance from a crest to the next crest, or from a trough to the next trough.
What is the wavelength.
200
The ability of a medium to return to its shape after being deformed, which determines the speed of sound waves through it.
What is elasticity.
200
The distance light can travel in one year.
What is a light-year.
200
The phenomenon which causes skies to be blue, sunsets to be yellow, and clouds to be white.
What is scattering.
200
Light rays entering a lens travelling parallel to the principal axis are bent to pass through this point.
What is the focal point.
300
The quantity equal to 1/Period.
What is the frequency.
300
Sound waves are repeating patterns of compression and this, in a medium.
What is rarefaction.
300
Light waves are fluctuations in these two fields in space, giving them the name "EM waves."
What are the electric and magnetic fields.
300
The type of image produced by a mirror.
What is a virtual image.
300
The idea that every portion of a wavefront can itself be considered a source of circular wavefronts.
What is Huygens' Principle.
400
The wave property calculated by multiplying the wavelength and the frequency of a wave.
What is the wave speed.
400
The phenomenon which occurs when an object is forced to vibrate at its natural frequency.
What is resonance.
400
A light beam in which all the waves are vibrating in the same direction, perpendicular to the direction of motion.
What is polarized light.
400
The separation of light into its component frequencies by refraction through a medium.
What is dispersion.
400
A pattern of closely spaced slits through which light is passed.
What is a diffraction grating.
500
The term for what happens to a wave whose source is receding away from you.
What is redshifting.
500
A pattern of fluctuations in the loudness of sound, caused by the interference of two different frequencies.
What are beats.
500
The fuzzy, gray area surrounding a dark, clear shadow area in the middle.
What is a penumbra.
500
The minimum angle at which light can strike a surface and experience total internal reflection.
What is the critical angle.
500
When creating a hologram, laser light illuminating an object interferes with light of the same frequency from this beam.
What is the reference beam.