Photoelectric Effect: Ejection of electrons from an atom or molecule that has absorbed a photon of sufficient energy. The photoelectric effect is the operating principle behind 'electric eyes'; it is experimental evidence for particle-like behavior of electromagnetic radiation.

 

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Photoelectric Effect: Ejection of electrons from an atom or molecule that has absorbed a photon of sufficient energy. The photoelectric effect is the operating principle behind 'electric eyes'; it is experimental . . . View Full Definition

Kostinsky Effect: Development effect in which dense image points are inclined to move apart, relative to each other, and light image points to move together, relative to each other. This occurs because develo . . . View Full Definition

Lake Effect Snow: Snow showers that are created when cold dry air passes over a large warmer lake, such as one of the Great Lakes, and picks up moisture and heat.

January Effect: Each year, the stock market tends to increase slightly in value between December 31 and the end of the first week of January. Known as the January Effect, this rise starts when investors sel . . . View Full Definition

Inverse Barometer Effect: The inverse response of sea level to changes in atmospheric pressure. A static reduction of 1.005 mb in atmospheric pressure will cause a stationary rise of 1 cm in sea level.

International Fisher Effect: States that the interest rate differential between two countries should be an unbiased predictor of the future change in the spot rate.

Limited Effects Theory: A type of communication theory (e.g., social learning theory, vicarious catharsis theory) that regards media as having conditional influences on the viewer: due to intervening variables, the . . . View Full Definition

Intermittency Effect: States that, a number of short, separate exposures will not produce the same photographic result when combined as a single exposure of equivalent total duration.

Memory Effect: The life of a battery may be gradually shortened if it is recharged before it is completely discharged. Memory effect most commonly occurs with Nickel Cadmium batteries are less of a problem . . . View Full Definition

Magnus Effect: The effect on a spinning cylinder or sphere moving through a fluid, in which force acts perpendicular to the direction of motion and to the direction of spin. This is used to advantage in ba . . . View Full Definition