Uses of
lenses
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QAMARINA ARIFIN
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What are LE N S MADE IN PARAGUAY 077
MM
the uses
ZOOM LENS 17-35 mm 1:2-8
?of lenses
well the uses of lens can be seen in
optical instruments..
1.MAGNIFYING 2.TELESCOPE 3.MICROSCOPE
GLASS
Optical
Instruments
MAGNIFYING
GLASS
Consists of hand lens which is a
convex lens .
Therefore, helps us to magnify a
tiny object.
Used to view small objects
whereby the image formed is
.larger than the size of the objects
The object to be
magnified must be
Made of
placed within the biconvex lens
focal length of the
lens
The characteristic
image distance of images formed
Magnification = object distance
=are
-virtual
-upright
-magnified
Formation of images in
magnifying glass
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TELESCOPE
An optical device used to view distant object
-Therefore it enable us to study planets and stars in
the outer space.
Made up of:
a long tube with a long focal
length lens as the objective lens
a short focal length lens as the
eyepiece
Distance between Used to observed consists of two
objective lens and
.distant object :convex lenses
=eyepiece lens
+fo fe objective lens and
eyepiece lens
Eyepieces lens act
as magnifying >f o f e
glass to enlarge
the real images objects at infinity
formed by the
Objective lens
.objective lens focusses the object to
form real and invered
image that falls on the
focal point of the
eyepiece lens
Formation of
images in
Telescopes
!GOOD LUCK
MICROSCOPE
an optical device used to view very small objects
Made up of:
a tube with two short focal length
lenses to give a much higher
magnification than a magnifying
glass
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Formation
images in
Microscopes
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