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A mirror or looking glass is an object that reflects an image. Light that bounces off a mirror will show an image of whatever is in front of it, when focused through the lens of the eye or a camera. Mirrors reverse the direction of the image in an equal yet opposite angle from which the light shines upon it. This allows the viewer to see themselves or objects behind them, or even objects that are at an angle from them but out of their field of view, such as around a corner. Natural mirrors have existed since prehistoric times, such as the surface of water, but people have been manufacturing mirrors out of a variety of materials for thousands of years, like stone, metals, and glass. In modern mirrors, metals like silver or aluminium are often used due to their high reflectivity, applied as a thin coating on glass because of its naturally smooth and very hard surface.
Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Because light is an electromagnetic wave, other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties.
Marin Mersenne, OM was a French polymath whose works touched a wide variety of fields. He is perhaps best known today among mathematicians for Mersenne prime numbers, those written in the form Mn = 2n − 1 for some integer n. He also developed Mersenne's laws, which describe the harmonics of a vibrating string, and his seminal work on music theory, Harmonie universelle, for which he is referred to as the "father of acoustics". Mersenne, an ordained Catholic priest, had many contacts in the scientific world and has been called "the center of the world of science and mathematics during the first half of the 1600s" and, because of his ability to make connections between people and ideas, "the post-box of Europe". He was also a member of the Minim religious order and wrote and lectured on theology and philosophy.
A mirror image is a reflected duplication of an object that appears almost identical, but is reversed in the direction perpendicular to the mirror surface. As an optical effect it results from reflection off from substances such as a mirror or water. It is also a concept in geometry and can be used as a conceptualization process for 3-D structures.
The history of the telescope can be traced to before the invention of the earliest known telescope, which appeared in 1608 in the Netherlands, when a patent was submitted by Hans Lippershey, an eyeglass maker. Although Lippershey did not receive his patent, news of the invention soon spread across Europe. The design of these early refracting telescopes consisted of a convex objective lens and a concave eyepiece. Galileo improved on this design the following year and applied it to astronomy. In 1611, Johannes Kepler described how a far more useful telescope could be made with a convex objective lens and a convex eyepiece lens. By 1655, astronomers such as Christiaan Huygens were building powerful but unwieldy Keplerian telescopes with compound eyepieces.
Las Meninas is a 1656 painting in the Museo del Prado in Madrid, by Diego Velázquez, the leading artist of the Spanish Baroque. It has become one of the most widely analyzed works in Western painting due to the way its complex and enigmatic composition and how Velazquez “sought to build a bridge between art and reality”, between subjects and viewers as well as a declaration of painting as a liberal art.
Scrying, also referred to as "seeing" or "peeping," is a practice rooted in divination and fortune-telling. It involves gazing into a medium, hoping to receive significant messages or visions that could offer personal guidance, prophecy, revelation, or inspiration. The practice lacks a definitive distinction from other forms of clairvoyance or divination but generally relies on visions within the chosen medium. Unlike augury, which interprets observable events, or divination, which follows standardized rituals, scrying's impressions arise within the medium itself.
Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves. The law of reflection says that for specular reflection the angle at which the wave is incident on the surface equals the angle at which it is reflected.
Specular reflection, or regular reflection, is the mirror-like reflection of waves, such as light, from a surface.
The mirror test—sometimes called the mark test, mirror self-recognition (MSR) test, red spot technique, or rouge test—is a behavioral technique developed in 1970 by American psychologist Gordon Gallup Jr. as an attempt to determine whether an animal possesses the ability of visual self-recognition. The MSR test is the traditional method for attempting to measure physiological and cognitive self-awareness. However, agreement has been reached that animals can be self-aware in ways not measured by the mirror test, such as distinguishing between their own and others' songs and scents.
Commodore Garrett Jesse Pendergrast was an officer in the United States Navy, who served at the beginning of the American Civil War.
Kate Morton is a fictional character from the BBC soap opera EastEnders, played by Jill Halfpenny.
Into the Mirror is a 2003 South Korean supernatural horror film about a series of grisly deaths in a department store, all involving mirrors, and the troubled detective who investigates them. It was the debut film of director Kim Sung-ho.
"Sunburn" is a song by English rock band Muse, released as the fourth single from their 1999 debut album Showbiz.
The Hockney–Falco thesis is a theory of art history, advanced by artist David Hockney and physicist Charles M. Falco. Both argued that advances in realism and accuracy in the history of Western art since the Renaissance were primarily the result of optical instruments such as the camera obscura, camera lucida, and curved mirrors, rather than solely due to the development of artistic technique and skill. Nineteenth-century artists' use of photography had been well documented.
Don O. Hendrix (1905–1961) was an American optician.
Mark Pendergrast is an American independent scholar and author of fourteen books, including three children's books. His books are mainly non-fiction and cover a wide range of topics, most notably repressed memories. He is a volunteer with the National Center for Reason and Justice, a non-profit organization that advocates for people who are falsely accused or convicted of crimes.
Mirrors is a 2008 American supernatural horror film directed by Alexandre Aja, starring Kiefer Sutherland, Paula Patton, and Amy Smart. The film was first titled Into the Mirror, but the name was later changed to Mirrors. Filming began on May 1, 2007, and it was released in American theaters on August 15, 2008.
An aerial telescope is a type of very long focal length refracting telescope, built in the second half of the 17th century, that did not use a tube. Instead, the objective was mounted on a pole, tree, tower, building or other structure on a swivel ball-joint. The observer stood on the ground and held the eyepiece, which was connected to the objective by a string or connecting rod. By holding the string tight and maneuvering the eyepiece, the observer could aim the telescope at objects in the sky. The idea for this type of telescope may have originated in the late 17th century with the Dutch mathematician, astronomer and physicist Christiaan Huygens and his brother Constantijn Huygens, Jr., though it is not clear if they actually invented it.
Jacques Maurice Beckers was a Dutch-born American astronomer. He was director of the National Solar Observatory between 1993 and 1998. Beckers worked mainly in the field of astrophysics and astronomical optometry.
References
- ↑ Schillinger, Liesl, 08-10-2003, Lens Crafters, "The New York Times"
- ↑ Smith, PD, 03-28-2004. On reflection ..., "The Guardian"