Worksheet Set A
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Coral Secondary School Secondary Two Physics 2009 Name: _____________________________ ( _____________
)
Class: _______
Date:
Topic : Light IV – Thin Converging Lenses 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 to its principal axis. L1-2.A __________ lens is a lens that diverges rays of light that are travelling parallel to its principal axis. L1-3.Converging lens are _______ across their middle and _______ at their upper and lower edges. L1-4.Diverging lens are _______ across their middle and _______ at their upper and lower 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 of 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 f but less than 2f Exactly equal to 2f
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 a complete ray diagram for each of the objects given, and label clearly, the image and the image distance. (a)
Object
2F
F
F
Image distance = __________ cm = ________cm
2F
object height = _________ cm
2009, Ronald Tan, Coral Secondary School
image height
Page 2 of 4
(b)
Object
F
F
2F
Image distance = __________ cm = ________cm
2F
object height = _________ cm
image height
(c)
Object
2F
F
F
Image distance = __________ cm = ________cm
2F
object height = _________ cm
2009, Ronald Tan, Coral Secondary School
image height
Page 3 of 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 of 4
)
Class: _______
Date:
Topic : Light IV – Thin Converging Lenses 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 to its principal axis. L1-2.A __________ lens is a lens that diverges rays of light that are travelling parallel to its principal axis. L1-3.Converging lens are _______ across their middle and _______ at their upper and lower edges. L1-4.Diverging lens are _______ across their middle and _______ at their upper and lower 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 of 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 f but less than 2f Exactly equal to 2f
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 a complete ray diagram for each of the objects given, and label clearly, the image and the image distance. (a)
Object
2F
F
F
Image distance = __________ cm = ________cm
2F
object height = _________ cm
2009, Ronald Tan, Coral Secondary School
image height
Page 2 of 4
(b)
Object
F
F
2F
Image distance = __________ cm = ________cm
2F
object height = _________ cm
image height
(c)
Object
2F
F
F
Image distance = __________ cm = ________cm
2F
object height = _________ cm
2009, Ronald Tan, Coral Secondary School
image height
Page 3 of 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 of 4
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