Resultant Vector Physics 
A resultant is a single vector which represents the combined effect of two or more othervectors (called components). The components can be determined either graphicallyor by using trigonometry. 

Vector Quantities Physics 
A vector quantity is defined as a quantity that has both magnitude and direction. To work with vector quantities, one must know the method for representing these quantities. 

Ray Optics Simulation and Calculator 
This application will simulate reflection and refraction of light with optics such as: A single ray of light defined by two points, A parallel beam of rays emerges from a linesegment, with density controlled by the "Ray density" slider, A mirror whose shape is part of a circle, which is defined by three points., Glass with any shapes constructed from line segments and circular arcs, including prisms and "spherical" lenses., etc. 

Resolution Force Vector Components Animation and Calculator 
When solving physics problems, it is often helpful to replace one force by a combination of two forces with given directions. Of course, these two forces must be equivalent to the given one. This means that their vector sum must agree with the given force. If this condition is fulfilled, we say that the force has been resolved into components. 

