Transcript LENS - Gyanpedia

THE MPU HR SEC SCHOOL
PRESENTED BY
M. DINESH BABU
M.A. MOSES SUSAI NATHAN
J. NIJAMUDEN
C.P. SATHISH
M. SURENDAR
GUIDED BY
B.RAVINDHRANATH.
LENS
A LENS IS A PIECE OF
TRANSPARENT MATERIAL
BOUND BY CURVED SURFACES
CONVEX LENS
CONVEX LENS IS A LENS WHICH IS
THICKER IN THE MIDDLE THAN AT
THE EDGES AND RAYS OF LIGHT
CONVERGE AFTER PASSING
THROUGH THEM.
CONCAVE LENS
CONCAVE LENS IS A LENS
WHICH IS THINNER IN THE
MIDDLE THAN AT THE EDGES
AND RAYS OF LIGHT DIVERGE
AFTER PASSING THROUGH
THEM.
CONJUGATE FOCI
CONJUGATE FOCI ARE A PAIR
OF POINTS ON THE PRINCIPAL
AXIS OF THE LENS SUCH THAT
AN OBJECT AT ONE OF THE
POINTS PRODUCES AN IMAGE
AT THE OTHER POINT.
HYPERMETROPIA
HYPERMETROPIA IS LONG SIGHT. IT
IS A DEFECT OF THE EYE WHEN
DISTANT OBJECTS CAN BE SEEN BY
THE EYE,BUT NEAR OBJECTS
CANNOT BE SEEN DISTINCTLY.
http://www.washington.edu/medical/uwmc/uwmc_clinics/eye/UW Department of Ophthalmology CATARACT
SURGERY.htm
REFERENCES
http://depts.washington.edu/ophthweb/trial.h
tml
http://www.schoolcircle.com/studycircle/phy
sics/ph-ms-b-icse-lens-pagetwo.htm
http://www.schoolcircle.com/studycircle/phy
sics/ph_ms_b_icse_lens_pageone.htm.
http://hyperphysics.phyastr.gsu.edu/hbase/geoopt/imgfor.html.c1
http://hyperphysics.phy_astr.gsu.edu/hbase/
geoopt/imgfor.html#c1
http://www.ccgateech.edu/scivis/-vbbin/shtml.execation/java
+
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