7253456 - produces a wave having some particular...

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Answer to 7253456 What is inverse square law for light waves? how was it applied there? and how light is being filtered in a polarizer as well as in neutral filter? This inverse-square law states that the intensity decreases in proportion to the square of the  distance from the source. Application: If a spherical body oscillates so that its radius varies sinusoidally with time, a spherical sound  wave is produced . The wave moves outward from the source at a constant speed if the medium  is uniform.Because of this uniformity, we conclude that the energy in a spherical wave  propagates equally in all directions. That is, no one direction is preferred over any other. Polarization An ordinary beam of light consists of a large number of waves emitted by the atoms of the light source. Each atom
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Unformatted text preview: produces a wave having some particular orientation of the electric field vector E, corresponding to the direction of atomic vibration. The direction of polarization of each individual wave is defined to be the direction in which the electric field is vibrating .In a polarizer the filter has a layer of Polaroid between two glass plates. In an ideal polarizer, all light with E parallel to the transmission axis is transmitted, and all light with E perpendicular to the transmission axis is absorbed. Neutral Filter A neutral density filter can be colourless.An ideal; neutral density filter reduces the intensity of wavelength by allowing the photographer to change aperture,exposure,or time of subject in different atmospheric condition....
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This note was uploaded on 07/31/2011 for the course ENG 13 taught by Professor Juandelacruz during the Spring '11 term at Mapúa Institute of Technology.

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