- LIANG JING JING ILLUMINATION MAGNIFYING GLASS HOW TO
- LIANG JING JING ILLUMINATION MAGNIFYING GLASS SERIES
Metamaterials and functional material development strategies are focused on the structures of the matter itself, which has led to unconventional and unique electromagnetic properties through the manipulation of light-and in a more general picture the electromagnetic waves-in widespread manner. Photonic crystals, nanolithography, plasmonics phenomena and nanoparticle manipulation are the main areas where these techniques have been applied successfully and led to an emergent material sciences branch known as metamaterials.
At the nanoscale, to control light and heat, matured nanostructure fabrication techniques have been developed in the last two decades, and a wide range of groundbreaking processes have been achieved.
LIANG JING JING ILLUMINATION MAGNIFYING GLASS HOW TO
Wireless communications, laser and computer technologies have all been achieved by altering the way light and other energy forms act naturally and how to manage them in a controlled manner. Note also that many of the lenses are convex, thus the light that goes through a specimen is focused and therefore magnified.Throughout human history, the control of light, electricity and heat has evolved to become the cornerstone of various innovations and developments in electrical and electromagnetic technologies. Figure: The Microscope: Notice the blue areas, which represent lenses. Due to the nature of light, and the maximum amount of refraction that can be possible by a material, there are limits to the amount of magnification that can be done by a light microscope.
LIANG JING JING ILLUMINATION MAGNIFYING GLASS SERIES
A magnifying glass is one convex lens, and this by itself allows the magnification of objects.Ī microscope is basically a series of lenses that take advantage of the nature of refraction. The simplest example of this that most people know is a magnifying glass. Light reflecting off an object is focused to a point. In essence, a convex lens allows magnification. The former property of convex lenses is of special interest to microbiologists. In general, two types of lenses exist: convex lenses, which cause parallel light rays to converge, and concave lenses, which cause parallel light rays to diverge. A device that produces converging or diverging light rays due to refraction is known as a lens. Taking advantage of the principle of refraction, devices can be built that can focus light. This effect is what is responsible for mirages seen on hot days where the changing index of refraction of the air causes the light rays to bend creating the appearance of specular reflections in the distance (as if on the surface of a pool of water).
Therefore, light rays curve through the medium rather than travelling in straight lines. Some media have an index of refraction that varies gradually with position. It is actually the water acting much like a lens in a microscope that gives it the appearance of bending. Figure: Refraction: As the light is reflected off the pencil we see that, due to the different refraction indexes of water and air, the pencil appears to bend in the water. The simplest case of refraction occurs when there is an interface between a uniform medium with an index of refraction and another medium with an index of refraction. Refraction occurs when light travels through an area of space that has a changing index of refraction. The underlying principal of a microscope is that lenses refract light which allows for magnification. Describe refraction and distinguish between convex and concave lenses.
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