Definition of Virtual image. Meaning of Virtual image. Synonyms of Virtual image

Here you will find one or more explanations in English for the word Virtual image. Also in the bottom left of the page several parts of wikipedia pages related to the word Virtual image and, of course, Virtual image synonyms and on the right images related to the word Virtual image.

Definition of Virtual image

Virtual image
Virtual Vir"tu*al (?; 135), a. [Cf. F. virtuel. See Virtue.] 1. Having the power of acting or of invisible efficacy without the agency of the material or sensible part; potential; energizing. Heat and cold have a virtual transition, without communication of substance. --Bacon. Every kind that lives, Fomented by his virtual power, and warmed. --Milton. 2. Being in essence or effect, not in fact; as, the virtual presence of a man in his agent or substitute. A thing has a virtual existence when it has all the conditions necessary to its actual existence. --Fleming. To mask by slight differences in the manners a virtual identity in the substance. --De Quincey. Principle of virtual velocities (Mech.), the law that when several forces are in equilibrium, the algebraic sum of their virtual moments is equal to zero. Virtual focus (Opt.), the point from which rays, having been rendered divergent by reflection of refraction, appear to issue; the point at which converging rays would meet if not reflected or refracted before they reach it. Virtual image. (Optics) See under Image. Virtual moment (of a force) (Mech.), the product of the intensity of the force multiplied by the virtual velocity of its point of application; -- sometimes called virtual work. Virtual velocity (Mech.), a minute hypothetical displacement, assumed in analysis to facilitate the investigation of statical problems. With respect to any given force of a number of forces holding a material system in equilibrium, it is the projection, upon the direction of the force, of a line joining its point of application with a new position of that point indefinitely near to the first, to which the point is conceived to have been moved, without disturbing the equilibrium of the system, or the connections of its parts with each other. Strictly speaking, it is not a velocity but a length. Virtual work. (Mech.) See Virtual moment, above.

Meaning of Virtual image from wikipedia

- rays, while a virtual image is the collection of focus points made by backward extensions of diverging rays. In other words, a virtual image is found by...
- digital preservation strategy. Disk images can be made in a variety of formats depending on the purpose. Virtual disk images (such as VHD and VMDK) are intended...
- programs, a virtual drive looks and behaves like an actual physical device. A virtual disk may be in any of the following forms: Disk image, a computer...
- while a virtual image is the collection of focus points made by extensions of diverging or converging rays. In other words, a real image is an image which...
- computing, virtualization (v12n) is a series of technologies that allows dividing of physical computing resources into a series of virtual machines, operating...
- and Northern Ireland of possession of a prohibited image of a minor. This act makes cartoon/virtual **** depicting minors illegal in England, Wales...
- Oracle VirtualBox (formerly Sun VirtualBox, Sun xVM VirtualBox and InnoTek VirtualBox) is a hosted hypervisor for x86 virtualization developed by Oracle...
- some realistic images, sounds and other sensations that simulate a user's physical presence in a virtual environment. A person using virtual reality equipment...
- part of its image makes a right angle with, and is bisected by, the surface of the plane mirror. The image formed by a plane mirror is virtual (meaning that...
- the point where they appear to form an image, this is called a virtual image. Unlike real images, a virtual image cannot be projected on a screen, but appears...