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Online Physics Glossary
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Word Meaning Remarks
Destructive interference Superposition of waves resulting in a combined wave with zero amplitude.
Diffraction Bending of waves around object in their path.
Diffraction grating Material containing many parallel lines very closely spaced that produces a light spectrum by interference.
Diffuse reflection Reflection of light into many directions by rough object.
Dimensional analysis Checking a derived equation by making sure dimensions are the same on both sides.
Diode Electrical device permitting only one way current flow.
Dispersion of light Variation with wavelength of speed of light through matter resulting in separation of light into spectrum.
Displacement Change in position. A vector quantity.
Dissonance Two or more sounds that, when together, sound unpleasant.
Distance Separation between two points. A scalar quantity.
Diverging lens Lens that causes light rays to spread apart or diverge; usually a concave lens.
Dopants Small quantities of material added to semiconductor to increase electrical conduction.
Doppler shift Change in wavelength due to relative motion of source and detector.
Dynamics Study of motion of particles acted on by forces.
Effective current DC current that would produce the same heating effects.
 
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