what is photoelectric effect discuss the effect of intensity of light on photoelectric current?
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According to classical electromagnetic theory, the photoelectric effect can be attributed to the transfer of energy from the light to an electron. From this perspective, an alteration in the intensity of light induces changes in the kinetic energy of the electrons emitted from the metal.
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Light as a Particle. Light behaves mainly like a wave but it can also be considered to consist of tiny packages of energy called photons. Photons carry a fixed amount of energy but have no mass. ... They also found that increasing the intensity of light increased the number of electrons ejected, but not their speed.
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The photoelectric effect refers to what happens when electrons are emitted from a material that has absorbed electromagnetic radiation. Physicist Albert Einstein was the first to describe the effect fully, and received a Nobel Prize for his work.
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Light intensity is not limiting the rate of photosynthesis at light intensities of five to eight units. As light intensity is increased the rate of photosynthesis remains the same.
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2 Answers. Photo electric effect occur in bound electron, while compton effect occur in free electron. In photo electron effect, the photo and hence energy of the photon is absorbed by the electron. While in compton effect photon is scattered.
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When light shines on a metal, electrons can be ejected from the surface of the metal in a phenomenon known as the photoelectric effect. This process is also often referred to as photoemission, and the electrons that are ejected from the metal are called photoelectrons.
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The intensity of sunlight decreases rapidly with depth. The depth of the water not only affects the colors of light that are noticeable underwater, it also affects the intensity, or amount of light. Within the first 10 m, water absorbs more than 50 percent of the visible light energy (Fig. 9.9).
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A Photochemical reaction is a reaction which takes place when a chemical process absorbs light energy as its energy source. The example is photosynthesis.
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Increasing the light intensity increases the rate of photosynthesis, until some other factor - a limiting factor - becomes in short supply. The rate of photosynthesis is directly proportional to the light intensity until another factor becomes limiting.
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Principle of solar energy: The Photovoltaic effect Photovoltaic (PV) effect is the conversion of sunlight energy into electricity. In a PV system, the PV cells exercise this effect. Semi-conducting materials in the PV cell are doped to form P-N structure as an internal electric field.
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An electromagnetic wave is characterized by its intensity and the frequency ν of the time variation of the electric and magnetic fields. In terms of the modern quantum theory, electromagnetic radiation is the flow of photons (also called light quanta) through space.
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Quantum view of light: The photoelectric effect introduced evidence that light exhibited particle properties on the quantum scale of atoms. At least light can achieve a sufficient localization of energy to eject an electron from a metal surface.
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The electric field intensity at a point in an electric field is the electric force experienced by a unit positive point charge located at that particular point. Electric flux density is the electric flux passing through a unit area normal to the direction of the flux.
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Inverse Square Law Formula. The inverse square law describes the intensity of light at different distances from a light source. Every light source is different, but the intensity changes in the same way. The intensity of light is inversely proportional to the square of the distance.
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While the photoelectric effect involves light photons knocking electrons out of a material completely, the photovoltaic effect involves photons from a light source knocking electrons only out of their atomic orbitals, but keeping them in the material; this allows them to flow freely through the material.
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As light intensity increases (distance between lamp and plant decreases) the volume of oxygen (or the rate of bubble production) increases. This indicates that the rate of photosynthesis increases with light intensity. However, at sufficiently high levels of light intensity, the rate oxygen evolution remains constant.
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The higher the voltage v the higher the current. If the brightness is caused by a flow of electrons through the filament, a higher voltage will--all things being equal-- drive more electrons to flow through the filament. So the brightness is a function of both current and voltage, and can be said to depend on both.