Virtual Image
Virtual Image - Related Videos
08:12
Two-photon Calcium Imaging in Mice Navigating a Virtual Reality Environment
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Cited by 98 •
2014
Here we describe the experimental procedures involved in two-photon imaging of mouse cortex during behavior in a virtual reality environment.
10:45
Brain Imaging Investigation of the Neural Correlates of Observing Virtual Social Interactions
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Cited by 10 •
2011
This article demonstrates an experimental design in which whole-body animated characters are used in conjunction with functional magnetic resonance imaging (fMRI) to investigate the neural correlates of observing virtual social interactions.
06:52
The use of Biofeedback in Clinical Virtual Reality: The INTREPID Project
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Cited by 48 •
2009
The Project on Virtual Reality Intelligent Multi-sensor System for the Treatment of Anxiety-related Disorders (INTREPID) is aimed at developing a multi-sensor context-aware virtual reality system for the treatment of anxiety-related disorders.
01:20
Virtual Work
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2023
The principle of virtual work states that if a body is in static and dynamic equilibrium, then the sum of all the virtual work done by all external forces and couple moments for any given virtual displacement must be zero. In static equilibrium, a body can experience an imaginary or virtual movement, such as displacement or rotation. The virtual work done by a force is equal to the dot product of force and virtual displacement in the direction of the force. When it comes to virtually rotating a...
09:17
Using a Virtual Store As a Research Tool to Investigate Consumer In-store Behavior
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Cited by 10 •
2017
This paper describes the use of a desktop virtual store to create virtual shopping environments to investigate in-store consumer behavior. A description of the protocol to build and run experiments, example results from an experiment concerning store layout, and important considerations when conducting virtual store experiments are presented.
FAQs
The apparent image location is found by extending reflected or refracted rays backward until their paths intersect. This construction identifies where the observer perceives the image, even though the rays remain separated there. In physics, backward ray extension provides the practical method for analyzing virtual-image locations in mirrors and lenses.
When the object lies inside the focal length of a converging lens, the refracted rays diverge after passing through the lens. Extending those rays backward identifies the apparent image position. This condition is especially important because it allows the lens to produce the magnified views associated with magnifying glasses.
The optical surface changes the paths of incoming light through reflection or refraction. The resulting rays may diverge rather than meet, so their backward extensions determine the apparent image location. This connection between surface interaction and ray direction explains why both mirrors and lenses can create virtual images under appropriate conditions.
Begin by representing the relevant light rays before and after they interact with the mirror or lens. Follow the reflected or refracted paths, then extend the outgoing rays backward. The point where those extensions intersect gives the image location used in the optical analysis, even though light does not travel through that point.
Plane mirrors and convex mirrors produce virtual images, while a converging lens produces one when the object is inside its focal length. These cases give ray-tracing practice across both reflection and refraction. Comparing them helps identify how the type of optical element and object position influence the observed image.
Virtual images help explain how optical systems create views that an observer perceives at an apparent location rather than at a point reached by converging light. In magnifying glasses, the relevant lens condition supports a magnified view. The same analysis also contributes to understanding and designing optical instruments and mirrors.