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Photoelectric Effect. The Photoelectric Effect Definition: It is the emission of
electrons from a metal surface under the illumination of a suitable radiation. ...
The Photoelectric Effect. ... There was one experiment conducted by Hertz, the photoelectric
effect, which could not be explained by considering light to be a wave. ...
What Is The Photoelectric Effect? The photoelectric effect refers to the
emission, or ejection, of electrons from the surface of ...
... Light Intensity Characteristics of Photocells The photoelectric effect is defined
as the emission of electrons from a material by visible light. ...
... the nature of particle movement known as Brownian motion, the quantum nature of
electromagnetic radiation as demonstrated by the photoelectric effect, and the ...
Submitted by oppapers on January 24, 2000
Category: Science
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Introduction The
Quantum Theory was the second of two theories
which drastically changed the way we look at our
physical world today, the first being Einstein’s
Theory of Relativity. Although both theories
revolutionized the world of physics, the Quantum
Theory required a period of over three decades to
develop, while the Special Theory of Relativity
was created in a single year. The development of
the Quantum Theory began in 1887 when a
German physicist, Heinrich Hertz, was testing
Maxwell’s Theory of Electromagnetic Waves.
Hertz discovered that ultraviolet light discharged
certain electrically charged metallic plates, a
phenomenon that could not be explained by
Maxwell’s Wave Theory. In order to explain this
phenomenon termed the photoelectric effect,
because both light and electricity are involved, the
Quantum Theory was developed. The
Photoelectric Effect Maxwell’s work with the
Theory of Electromagnetic Waves may seem to
have solved the problem concerning the nature of
light, but at least one major problem remained.
There was one experiment conducted by Hertz,
the photoelectric effect, which could not be
explained by considering light to be a wave. Hertz
observed that when certain metals are illuminated
by light or other electromagnetic radiation, they
lose electrons. Suppose we set up an electric
circuit. In this circuit the negative terminal of a
battery has been connected to a piece of sodium
metal. The positive terminal of the battery is
connected through a meter that measures electric
current, and to another piece of metal. Both of
these metal plates are enclosed in a sealed glass
tube in which there is a vacuum. When there is no
light illuminating the sodium plate, no current will
flow, and...
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