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Hertzsprung-Russell Diagram
Two astronomers, Hertzprung and Russell independently experimented with plotting luminosity versus surface temperature. The resulting diagram came to be known as a Hertzprung-Russell diagram, or H-R ...
Simple magnification
A ray diagram (with explanation) showing an object, it's virtual image, a lens and a retina on which the position of the lens can be altered and the effect seen. The diagram is clear in this vertical ...
Feynman Diagram
In order to visualize and describe quantum electrodynamical interactions, physicist Richard P. Feynman introduced an ingenious schematic form of drawing now called a Feynman diagram.
Magnifying with a bi-convex lens
A ray diagram including object, image and lens on which you can move the lens to adjust the magnification. Clear description of the ray diagram. I love watching an inverted giraffe grow before my ...
Free Body Diagram
A free-body diagram is a sketch of an object of interest with all the surrounding objects stripped away and all of the forces acting on the body shown.
Refraction of light
An animated wave diagram showing how an incident wave is refracted for a variety of angles of incidence, and a variety of materials. The wavelength can also be varied, but on the diagram this has NO ...
Feynman Diagrams
Feynman diagrams are graphical ways to represent exchange forces and are used to represent particle interactions.
What causes a mirage?
Brief explanation with diagram from Scientific American.
Jupiter Effect
Diagram showing forces of attraction with planet alignment.
Ask us a sports question
What effect does the rim of a frisbee have on its flight? Find out here through a clear explanation and diagram.

