which term is used to describe objects that produce light
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- The electromagnetic spectrum is the term used by scientists to describe the entire range of light that exists. From radio waves to gamma rays, most of the light in the universe is, in fact, invisible to us! Light is a wave of alternating electric and magnetic fields.he electromagnetic spectrum is the term used by scientists to describe the entire range of light that exists. From radio waves to gamma rays, most of the light in the universe is, in fact, invisible to us! Light is a wave of alternating electric and magnetic fields.
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- When objects appear to glow under the light, they are substances that are emitting light in response to radiation. These phosphors are what make normal things like teeth and white t-shirts glow in the dark! See our black light uses section.
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Sensation and Perception The Senses. Researchers have studied vision more thoroughly than the other senses. Because people need sight to perform most daily activities, the sense of sight has evolved to be highly sophisticated. Vision, however, would not exist without the presence of light. Light is electromagnetic radiation that travels in the form of waves. Light is emitted from the sun, stars, fire, and lightbulbs. Most other objects just reflect light. People experience light as having three features: color, brightness, and saturation.
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What is Light? Light can be generated by the matter or a photon of light can interact with the energy levels in a number of ways. We can represent the energy levels in a diagram known as a Jablonski diagram. An example of one is shown in the diagram above.
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- The color appearance of objects changes dramatically in early morning or in the shade. Electric light sources can also exhibit variations in color makeup. Incandescent lamps tend to produce more red and yellow light than green and blue, and appear to be “warm” in color.
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- Light is the result of electrons moving between defined energy levels in an atom, called shells. When something excites an atom, such as a collision with another atom or a chemical electron, an electron may absorb the energy, boosting it up to a higher-level shell.
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A Glossary of Lighting Terms A device that produces light for a fiber optic lighting system, which also is made up of fiber optic fibers and sometimes fixtures used at the ends of the fibers to direct the light in a specified manner. The light source used in an illuminator is usually an MR halogen lamp, an MR metal halide lamp, or an LED lamp.
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Blacklight A blacklight (or often black light), also referred to as a UV-A light, Wood's lamp, or simply ultraviolet light, is a lamp that emits long-wave ultraviolet light and not much visible light. One type of lamp has a violet filter material, either on the bulb or in a separate glass filter in the lamp housing, which blocks most visible light and allows through UV, so the lamp has a dim violet glow when operating.
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Different Types of Light Microscopes A light microscope is one that relies on light to produce the viewed image. There are other types of microscopes that use energy other than light.
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Lighting Lighting or illumination is the deliberate use of light to achieve a practical or aesthetic effect. Lighting includes the use of both artificial light sources like lamps and light fixtures, as well as natural illumination by capturing daylight. Daylighting (using windows, skylights, or light shelves) is sometimes used as the main source of light during daytime in buildings.
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- Transparent objects allow light to travel through them. Materials like air, water, and clear glass are called transparent. When light encounters transparent materials, almost all of it passes directly through them. Glass, for example, is transparent to all visible light. Translucent objects allow some light to travel through them.
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Light Microscopy The light microscope, so called because it employs visible light to detect small objects, is probably the most well-known and well-used research tool in biology. Yet, many students and teachers are unaware of the full range of features that are available in light microscopes.
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- 1.lens: a curved piece of glass or plastic that brings together or spreads apart light rays passing through; object that refracts light. 2.light energy: energy that can travel in waves through space and be seen by the human eye. 3.luminous: to emit or produce glowing light.
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- Visible Light. The narrow visible part of the electromagnetic spectrum corresponds to the wavelengths near the maximum of the Sun's radiation curve. In interactions with matter, visible light primarily acts to elevate electrons to higher energy levels. White light may be separated into its spectral colors by dispersion in a prism.
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Camera obscura For other uses, see Camera obscura (disambiguation) . Camera obscura is Latin for dark chamber.. It is the name given to a simple device used to produce images that would lead to the invention of photography. The English word for today's photographic devices is merely a shortening of this name to  camera .
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Electric light An electric light is a device that produces visible light by the flow of electric current. It is the most common form of artificial lighting and is essential to modern society, providing interior lighting for buildings and exterior light for evening and nighttime activities.
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What Objects Reflect Light Best? Almost every object will reflect light in some way. In fact, if an object does not produce its own light it will not be visible if it does not reflect that of other sources. Reflection works by angles. Light shines onto a surface in what is called an incident ray. The angle that this ray strikes the surface of the object is measured by imagining a line coming out from the surface at the point that the light strikes it, at right angles to the object.
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- Answer . White light is a mixture of all of the visible wavelengths in the spectrum. When white light strikes any object, some, all, or none is reflected off it and the balan…ce of the light spectrum is absorbed. For example a baseball essentially reflects ALL of the wavelengths striking it, absorbing none.
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How Light Works Scientists now could develop a complete working model of light using terms and concepts, such as wavelength and frequency, based on the structure and function of waves. According to that model, light waves come in many sizes.
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- The energy of visible light can be measured in organized packets  called photons. These photons have discrete values of energy,  meaning there is exact amounts of energy the…se have, and don't vary  in decimal places.
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- The word light usually makes one think of the colors of the rainbow or light from the Sun or a lamp. This light, however, is only one type of electromagnetic radiation. Electromagnetic radiation comes in a range of energies, known as the electromagnetic spectrum.
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- Objects that emit and reflect light in space Objects in space that emit light: Sun, Stars, Galaxies, Nebulae, and Meteors in the Earth's atmosphere. Objects in space that reflect light: Comets, Asteroids, Meteoroids in space, moons or natural satellites, and artificial satellites.
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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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- Light microscope. . Light microscope is a common optical device using the visible wavelengths.Optical microscopes are widely used for viewing small objects in colour.It can be binocular and monocular, trinocular for the use of video capturing devices..
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- Visible light, as with all types of electromagnetic radiation (EMR), is experimentally found to always move at this speed in a vacuum. In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not. In this sense, gamma rays, X-rays, microwaves and radio waves are also light. Like all types of light, visible light is emitted and absorbed in tiny packets called photons and exhibits properties of both waves and particles.
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Types of Light Sources and Light Bulbs Types of Bulbs. INCANDESCENT. Incandescent bulbs produce light when an electric current passes through a filament and causes it to glow. Because they are less energy efficient than other light sources, they are best used for task lighting that demands high levels of brightness.