Download - Optical instruments, Dispersion and Colors
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Optical InstrumentsDispersion
andColor
Prepared By:Angelica V. Villegas
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Optical Instruments
The devices which are used in various purposes like microscope, telescopes, lens, magnifying lens, mirror, astronomical telescope, glass etc.
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Optical LensesOptical Lenses play the most important roles in optical instruments.
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Two Basic Types of Optical Lenses
1.Concave Lens2. Convex Lens
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1.Concave LensConcave lenses diverge light rays which enter into that and for the same reason concave lenses are also called as DIVERGING LENSES.
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THREE TYPES OF CONCAVE LENS
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2. Convex LensConvex lenses converge light rays which enter into that and for the same reason convex lenses are also called as CONVERGING LENSES.
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THREE TYPES OF CONVEX LENS
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The different type of equipment that uses optical lenses and or
optical mirrors and work on their principles is called Optical
Devices
Optical Devices
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A concave lens is used as a Door Eye. The lens is fixed on the main door of a house as shown in fig
below.
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Optical Storage Devices
Examples
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1. A Camera is used for taking photographs.
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2. Binocular is a device which is used the far off objects clearly.
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3. Electric Cells are electronic devices which senses and converts light energy to electrical voltages.
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4. Optical prisms are used for reflecting light using the principle of total internal reflections.
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HYPERMETROPIAHyperopia, also known as farsightedness, long-sightedness or hypermetropia, is a defect of eye as the light is focuses at a point behind the retina not on the retina of the eye.
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Myopia or Near sightedness is a deficiency of an eye, mostly due to error occurs with the focal length of the lens of the human eye.
MYOPIA
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CHROMATIC DISPERSION or DISPERSION
In optics, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency.
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RAINBOWThe most familiar example of dispersion.
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COLORColor is a function of the human visual system, and is not an intrinsic property. Objects don't "have" color, they give off light that "appears" to be a color.
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References:http://physics.tutorvista.com/light/optical-instruments.htmlhttp://physics.info/color/https://en.wikipedia.org/wiki/Dispersion_(optics)