| Destructive interference | | Consists of a voltage source that maintains an electrical potential and a device where work is done by the electrical potential. |
| Diffraction | | An electrical current that always moves in one direction. |
| Diffuse reflection | | The flow of electric charge electric field force field produced by an electrical charge. |
| Direct current | | materialsthat have electrons that are free to move throughout the materials |
| Dispersion | | a magnet formed by a solenoid that can be turned on and off by turning the current on and off |
| Displacement | | electrical nonconductors |
| Distance | | The bending of light around the edge of an opaque object. |
| Doppler effect | | Light rays reflected in many random directions, as opposed to the parallel rays reflected from a perfectly smooth surface such as a mirror. |
| Echo | | materials that have electrons that are not moved easily within the material for example rubber. |
| Electrical circuit | | a map of an electric feild representing the direction of the force that a test charge would experience |
| Electric current | | An apparent shift in the frequency of sound or light due to relative motion between the source of the sound or light and the observer. |
| electric feild lines | | The actual length of the path traveled by a body irrespective of the direction. |
| electric potential energy | | solution of ionic substance that conducts an electric current |
| electrical conductors | | the property of opposing or reducing electricurrent |
| electrical force | | Sound reflected that can be distinguished from the original sound. |
| electrical insulators | | energy due to postition of a charge near other charges |
| electrical nonconductors | | The condition in which 2 waves arriving at the same point at the same time out of phase add amplitudes to create zero total disturbance. |
| electrical resistance | | The effect of spreading colors of light into a spectrum with a material that has an index of refraction that varies from wavelength. |
| electrolyte water | | The change in the position of an object in a particular direction. |
| electromagnet | | fundamental force that result results from the interaction of electrial chargeand is billions and billions times stronger than the gravitational force |
