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Transcript of MIRRORS
true picture of something else. TYPES OF MIRRORS LAW OF REFLECTION Two mirrors placed at any angleN= number of images formed
Magnification = height of image/
height of object •They come from a section of a spherical glass. A concave is the inner portion and convex is the outer or the surface. a mirror with a curved reflective surface , which The law of reflection still holds for this type of mirror. However, the distances and sizes of the object and the image are no longer equal. Characteristics of Images Formed
1. Located behind the mirror
3. Same size as the object
5. Undergoes a lateral inversion in relation to the object.
6. Situated at the same distance from the mirror as the object. USES According to Position of object For the primary ray, use Parallel then direct it to the focus after reflection.
For the second ray direct it from the object to the focus. After hitting the mirror, draw a line parallel to the principal axis. A simple Guide in using the ray diagram method
The inner portion of the sphere. This is a mirror that curves inwards like a "cave."
The image formed is larger.
It curves outwards like the back of a spoon
image formed is usually smaller THE TWO KINDS OF CURVED MIRRORS THE TWO KINDS OF CURVED MIRRORS LEGEND: F - focus
C- center of curvature PARTS OF A CURVED MIRROR CASE 3: object between
C and F CASE 1: object is at C RAY DIAGRAMS FOR CONCAVE MIRRORS RAY DIAGRAMS FOR CONCAVE MIRRORS TWO MIRRORS PLACED AT ANY ANGLE Magnification
Magnification = height of image/
height of object may be either convex (bulging outward) or concave (bulging inward). FACTS ABOUT CURVED MIRRORS The most common kinds are parabolic and the spherical. PARTS OF A CURVED MIRROR PARTS OF A CURVED MIRROR Real, Inverted, Same size CASE 2: object at F No Image No Image Real, Inverted, Magnified Virtual, Upright, Magnified N= number of images formed height of image height of object __________________ Magnification = MAGNIFICATION Mnemonics: RIS Mnemonics: NO Mnemonics: RIM Mnemonics: VUM CASE 4: Object between
F and V USES OF CONCAVE MIRRORS USES OF CONCAVE MIRRORS Ray Diagram for Convex mirrors Ray Diagram for Convex mirrors For all positions of the object, it will always be Virtual, upright, and Diminished Mnemonics: VUD USES OF CONVEX MIRRORS References Indoor convex mirrors
- for avoiding collisions of personnel/objects Surveillance cameras (duh!) Inspection mirror (mini!)
- for smaller, more intricate machinery, e.g. clocks Outdoor convex mirrors
- for road safety Security mirrors
- used in establishments and other areas with valuables to see people's activity 4 3 2 1 Rearview mirrors - for wide view of vehicle rears Rearview mirrors - for wide view of vehicle rears Inspection mirrors - for heavy machinery/car repairs Security mirrors "History of mirrors - The earliest man made mirrors." Invention of the Mirrors and Its Origins - Mirror History. N.p., n.d. Web. 29 Jan. 2013. <http://www.mirrorhistory.com/mirror-history/history-of-mirrors/>.
"The Inventor of Mirror - Who Invented Mirror?." Invention of the Mirrors and Its Origins - Mirror History. N.p., n.d. Web. 29 Jan. 2013. <http://www.mirrorhistory.com/mirror-history/who-invented-mirror/>.
"Concave Mirror, Concave Mirrors, Concave Mirror Equation | Physics@TutorVista.com." Physics Help, Physics Homework Help, Physics Problem Solver | Physics@TutorVista.com. N.p., n.d. Web. 29 Jan. 2013. <http://physics.tutorvista.com/light/concave-mirror.html#>.
Flora, Christy. "Uses of Convex & Concave Mirrors | eHow.com." eHow | How to Videos, Articles & More - Discover the expert in you. | eHow.com. N.p., n.d. Web. 29 Jan. 2013. <http://www.ehow.com/about_4728136_uses-convex-concave-mirrors.html>.
Maas, Karen. "Uses for Convex Mirrors | eHow.com." eHow | How to Videos, Articles & More - Discover the expert in you. | eHow.com. N.p., n.d. Web. 29 Jan. 2013. <http://www.ehow.com/about_5652352_uses-convex-mirrors.html>.
Mellendorf, Dr. Ken. " Skinny and Fat Mirrors Skinny and Fat Mirror Images ." NEWTON, Ask a Scientist at Argonne National Labs!. US Department of Energy, n.d. Web. 29 Jan. 2013. <http://www.newton.dep.anl.gov/askasci/phy05/phy05108.htm>. used in PERISCOPES To reverse text written backwards To create multiple images by placing two mirrors opposite each other Used in Solar Panels to harness
energy from the sun USES OF PLANE MIRRORS USES OF PLANE MIRRORS USES OF PLANE MIRRORS to look at ourselves used in KALEIDOSCOPES MIRRORS