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Optics Mirrors
Optics: 2 locations where object can be placed in front of concave mirror?
Find the two locations where an object can be placed in front of a concave mirror with a radius of curvature of 44 cm such that its image is four times its size.
For m = 4 = +di/do, where do is the object distance, and di is the image distance
Hence, di = 4do
1/do + 1/di = 1/f
1/do + 1/4do = 1/f
For concave mirrors, the center of curvature is = 2f. Then,
5/4do = 2/r
Hence, do = (5/2)r
For For m = 4 = -di/do, di = -4do
1/do + 1/di = 1/f
1/do - 1/4do = 1/f
3/4do = 2/r
Hence, do = (3/2)r
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Objective (Optics) $90.81 High Quality Content by WIKIPEDIA articles In an optical instrument, the objective is the optical element that gathers light from the object being observed and focuses the light rays to produce a real image. Objectives can be single lenses or mirrors, or combinations of several optical elements. They are used in microscopes, telescopes, cameras, slide projectors, CD players and many other optical instruments. Objectives are also called object lenses, object glasses, or objective glasses. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 128 Publication Date: 2010/07/08 Language: English Dimensions: 5.98 x 9.01 x 0.30 inches |
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PNW Optics: Concave Mirrors
This is a question on optics?
consider that u r sitting in a room with any two adjacent sides and ceiling(top) as plane mirrors.then,
1. How many no of images are formed?
2. How many no of images can u ( person sitting in a room )can see?
3. How many images are erect and virtual?
take dis way
room=90
first 2 adjacent=90
1 adja + ceiling=90
2nd adja + ceiling=90
use mirror formular=360-1/n
where n=no of images;;;;;good luk
2 as many as formed
3all is virtual,erect=d no of images formed in d ceiling mirror
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