02/05/2008 by admin.

Electromagnetic (EM) radiation, is a self-propagating wave disturbance in space which is the phenomenon perceived by the human eye as light. EM radiation has an electric and magnetic field component which oscillate in phase perpendicular to each other and to the direction of energy propagation. Electromagnetic radiation is classified into types according to the frequency of the wave, these types include (in order of increasing frequency): radio waves, microwaves, terahertz radiation, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays. Where radio waves have the longest wavelength and Gamma rays have the shortest

Posted in Uncategorized | No Comments »

02/05/2008 by admin.

“Photograph” is one of the most famous songs and 1983 single by British hard rock band Def Leppard from their multi-platinum album Pyromania. It was written for the late Marilyn Monroe, as Joe Elliott often stated before playing the song live in concerts. When released as a single later that year, it reached #1 on the Mainstream Rock charts and #12 on Pop Singles. More recently, the song was used in promotional ads for the DVD release of Blades of Glory. Photograph is known for sparking the mainstreams awareness of Glam Metal.

Posted in Uncategorized | No Comments »

02/05/2008 by admin.

In 3D computer graphics, the image plane is that plane in the world which is identified with the plane of the monitor. If one makes the analogy of taking a photograph to rendering a 3D image, the surface of the film is the image plane. In this case, the viewing transformation is a projection that maps the world onto the image plane. A rectangular region of this plane, called the viewing window or viewport, maps to the monitor. This establishes the mapping between pixels on the monitor and points (or rather, rays) in the 3D world.

Posted in Uncategorized | No Comments »

02/05/2008 by admin.

In optics, an aperture is a hole or an opening through which light is admitted. More specifically, the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane. The aperture determines how collimated the admitted rays are, which is of great importance for the appearance at the image plane. If the admitted rays also pass through a lens, highly collimated rays (narrow aperture) will result in sharpness at the image plane, while uncollimated rays (wide aperture) will result in sharpness for rays with the right focal length only. This means that a wide aperture results in an image that is sharp around what the lens is focusing on and blurred otherwise. Obviously, the aperture also determines how many of the incoming rays that are actually admitted and thus how much light that reaches the image plane (the narrower the aperture, the darker the image).

Posted in Uncategorized | No Comments »