-
8/14/2019 Worksheet Set A
1/4
Syllabus
Students should be able to
(a) describe the action of a thin lens (both converging and
diverging) on a beam of light
(b) define the term focal length for a converging lens
(c) draw ray diagrams to illustrate the formation of real and
virtual images of an object
by a thin converging lens
For Questions 1 to 6, refer to power point slides.
L1-1.A _________lens is a lens that converges rays of light that
are travelling parallel toits principal axis.
L1-2.A __________lens is a lens that diverges rays of light that
are travelling parallel toits principal axis.
L1-3.Converging lens are _______ across their middle and _______
at their upper andlower edges.
L1-4.Diverging lens are _______ across their middle and _______
at their upper andlower edges.
L1-5.A lens has _________ focal points.
L1-6._____________ is the distance between the focal point and
the centre of the lens.
2009, Ronald Tan, Coral Secondary School Page 1 of4
Coral Secondary SchoolSecondary Two Physics 2009
Name: _____________________________ ( ) Class: _______ Date:
_____________
Topic : Light IV Thin Converging Lenses
-
8/14/2019 Worksheet Set A
2/4
L2-7.Using the information in the notes, determine the image
properties in the following
scenarios based on the positions of the object from the
lens.
Object Distance Image distance(in terms of f)
Image Characteristics
Less than f
Exactly equal to
f
Greater than fbut less than 2f
Exactly equal to2f
Greater than 2f
Infinity
*f is the focal length of the lens
L2-8.Use the information on constructing a ray diagram in the
notes, construct acomplete ray diagram for each of the objects
given, and label clearly, the image and
the image distance.
(a)
Image distance = __________ cm object height = _________ cm
image height
= ________cm
2009, Ronald Tan, Coral Secondary School Page 2 of4
2F 2FF F
Object
-
8/14/2019 Worksheet Set A
3/4
(b)
Image distance = __________ cm object height = _________ cm
image height
= ________cm
(c)
Image distance = __________ cm object height = _________ cm
image height
= ________cm
2009, Ronald Tan, Coral Secondary School Page 3 of4
2F 2FF F
Object
2F 2FF F
Object
-
8/14/2019 Worksheet Set A
4/4
L3-9A lens of diameter of 5 cm is used and it has a focal length
of 3 cm. A 2 cm object is
placed in from of the lens at a distance of 4 cm.
Construct the ray diagram of using the information given and
state the properties
of this image. (Mark out the positions of the focal point and
lens position first)
Properties of image:
________________________________________________________________
________________________________________________________________
________________________________________________________________
2009, Ronald Tan, Coral Secondary School Page 4 of4
