enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Foucault knife-edge test - Wikipedia

   en.wikipedia.org/wiki/Foucault_knife-edge_test

   Viewing the mirror from behind the knife edge shows a pattern on the mirror surface. If the mirror surface is part of a perfect sphere, the mirror appears evenly lighted across the entire surface. If the mirror is spherical but with defects such as bumps or depressions, the defects appear greatly magnified in height.

3. Chinese magic mirror - Wikipedia

   en.wikipedia.org/wiki/Chinese_magic_mirror

   The front was polished and could be used as a mirror, while the back has a design cast in the bronze, [2] or other decoration. When sunlight or other bright light shines onto the mirror, the mirror appears to become transparent. If that light is reflected from the mirror onto a wall, the pattern on the back of the mirror is then projected onto ...

4. Zograscope - Wikipedia

   en.wikipedia.org/wiki/Zograscope

   Large table-top viewer for vue d'optique prints. Late 18th century An example of a picture designed for viewing under a zograscope equipped with a mirror, its text written right-to-left. A zograscope is an optical device for magnifying flat pictures that also has the property of enhancing the sense of the depth shown in the picture

5. Magnifying glass - Wikipedia

   en.wikipedia.org/wiki/Magnifying_glass

   A magnifying glass is a convex lens that is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle. A magnifying glass can be used to focus light, such as to concentrate the Sun's radiation to create a hot spot at the focus for fire starting. A plastic Fresnel lens sold as a TV-screen magnifier

6. Hobnail - Wikipedia

   en.wikipedia.org/wiki/Hobnail

   Hobnailed boots (in Scotland "tackety boots") are boots with hobnails (nails inserted into the soles of the boots), usually installed in a regular pattern, over the sole. They usually have an iron horseshoe-shaped insert, called a heel iron, to strengthen the heel, and an iron toe-piece.

7. Perfect mirror - Wikipedia

   en.wikipedia.org/wiki/Perfect_mirror

   A very complex dielectric mirror can reflect up to 99.999% of the light incident upon it, for a narrow range of wavelengths and angles. A simpler mirror may reflect 99.9% of the light, but may cover a broader range of wavelengths. Almost any dielectric material can act as a perfect mirror through total internal reflection. This effect only ...