File Name: nature of light and its properties .zip
Scientists discovered much of what we know about the structure of the atom by observing the interaction of atoms with various forms of radiant, or transmitted, energy, such as the energy associated with the visible light we detect with our eyes, the infrared radiation we feel as heat, the ultraviolet light that causes sunburn, and the x-rays that produce images of our teeth or bones.
The history of science shows that for each scientific issue there may be more than one models that are simultaneously accepted by the scientific community. One such case concerns the wave and corpuscular models of light. Newton claimed that he had proved some properties of light based on a set of minimal assumptions, without any commitments to any one of the two models.
Stephen A. In order to understand the optical properties of crystals we must first understand something about light and how it interacts with matter. Light is electromagnetic radiation that has properties of waves. The electromagnetic spectrum can be divided into several bands based on the wavelength. As we have discussed before, visible light represents a narrow group of wavelengths between about nm and nm. Our eyes interpret these wavelengths as different colors.
Light is intimately involved with our daily lives. Many unique properties of light are extremely fascinating. Here, we will take one step closer to the wonders of light through its well-known basic properties. Light travels at a speed of , kilometers per second. Light has the properties of a wave and a particle. It is the distance that light travels in one oscillation, and is often expressed using a unit called "nanometer". One nanometer is equal to one billionth of a meter.
Optics is the branch of physics that studies the behaviour and properties of light , including its interactions with matter and the construction of instruments that use or detect it. Because light is an electromagnetic wave , other forms of electromagnetic radiation such as X-rays , microwaves , and radio waves exhibit similar properties. Most optical phenomena can be accounted for by using the classical electromagnetic description of light. Complete electromagnetic descriptions of light are, however, often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics , treats light as a collection of rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive model of light, which includes wave effects such as diffraction and interference that cannot be accounted for in geometric optics.
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Just what is the true nature of light? Is it a wave or perhaps a flow of extremely small particles? These questions have long puzzled scientists.
The light that we see everyday is only a fraction of the total energy emitted by the sun incident on the earth. Sunlight is a form of "electromagnetic radiation" and the visible light that we see is a small subset of the electromagnetic spectrum shown at the right. The electromagnetic spectrum describes light as a wave which has a particular wavelength.
Light , electromagnetic radiation that can be detected by the human eye. Within that broad spectrum the wavelengths visible to humans occupy a very narrow band, from about nanometres nm; billionths of a metre for red light down to about nm for violet light. The spectral regions adjacent to the visible band are often referred to as light also, infrared at the one end and ultraviolet at the other. The speed of light in a vacuum is a fundamental physical constant , the currently accepted value of which is exactly ,, metres per second, or about , miles per second.
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Light, or Visible Light, commonly refers to electromagnetic radiation that can be detected by the human eye.