An ancient Assyrian wall relief, depicting the symbol of a winged bull with the head of a human male.
The Assumption and the Coronation of the Virgin is a woodcut created by Albrecht Dürer in 1510.…
"Showing how the image of an object which is seen is formed on the retina of the eye." —Croft 1917
Device used for contact printing that holds a negative against the photographic paper. The paper is…
"If the object a be placed obliquely before the convex mirror, then the converging rays from its two…
"Slit A is a very small opening. The light coming from the soldier on the right shines through the slit…
"Showing a system with chromatic difference of spherical aberration. O" ₌ image of O for red light;…
"Let a candle c, be placed on the inside of a box or tube, so that its light may pass through the plano-convex…
"The focus of each point chose may be determined by tracing two rays from the point, and locating their…
"When the object is at a distance from the mirror somewhat greater than the center of curvature, as…
"To explain this, let us suppose that the arrow a, is diminished by reflection from the convex surface,…
"Rays from an object showing the reproduction of an image in a convex mirror." -Avery 1895
"Parallel rays strike the convex mirror, reflect, and diverge as if they had originated from a virtual…
"The construction for the image produced by a plane mirror depends upon the fact that the image of the…
"Regular reflection results from the incidence of radiant energy upon a polished surface. When a beam…
"Showing how an object is refracted through a biconvex lens." -Avery 1895
This sculpture depicts a female that has been layed to rest and her last earthly image is of the spirits…
"O' is the virtual image of O formed at a spherical surface of centre C and radius CS." —Encyclopaedia…