Ads
related to: adding prism to eyeglass lenses near metemu.com has been visited by 1M+ users in the past month
Search results
Results from the WOW.Com Content Network
Abbe number. In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is an approximate measure of the material's dispersion (change of refractive index versus wavelength), with high values of V indicating low dispersion. It is named after Ernst Abbe (1840–1905), the German physicist ...
Focal length. The focal point F and focal length f of a positive (convex) lens, a negative (concave) lens, a concave mirror, and a convex mirror. The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a ...
Lenticular lenses are sometimes used as corrective lenses for improving vision. A bifocal lens could be considered a simple example. Lenticular eyeglass lenses have been employed to correct extreme hyperopia (farsightedness), a condition often created by cataract surgery when lens implants are not possible.
Text. Alice's Adventures in Wonderland at Wikisource. Alice's Adventures in Wonderland (commonly Alice in Wonderland) is an 1865 English children's novel by Lewis Carroll, a mathematics don at Oxford University. It details the story of a girl named Alice who falls through a rabbit hole into a fantasy world of anthropomorphic creatures.
Anne Jacqueline Hathaway (born November 12, 1982) is an American actress. Her accolades include an Academy Award, a British Academy Film Award, a Golden Globe Award, and a Primetime Emmy Award. Her films have grossed over $6.8 billion worldwide, and she appeared on the Forbes Celebrity 100 list in 2009. She was among the world's highest-paid ...
A mirror reflecting the image of a vase A first-surface mirror coated with aluminium and enhanced with dielectric coatings. The angle of the incident light (represented by both the light in the mirror and the shadow behind it) exactly matches the angle of reflection (the reflected light shining on the table). 4.5-metre (15 ft)-tall acoustic mirror near Kilnsea Grange, East Yorkshire, UK, from ...