Resource Lesson
Converging Lens Examples
Printer Friendly Version
Directions:
As you review these problems work out each example on your own paper, boxing in your answers as you go. Make sure that you state the formulas and list each problem's givens prior to solving for any requested numerical answers. Although polished rays diagrams are not required, sketches for each situation are recommended. Since this is a demonstration lesson, you may view correct answers as often as necessary to verify that you understand the steps in each problem set. Once all four problems are completed, then you are ready to proceed to your first individual worksheet.
To calculate the location of the image we use the
thin lens equation
.
Refer to the following information for the next four questions.
When rays from the distant sun pass through a convex lens a bright point image of the sun is cast 0.7 meters behind the lens onto the ground.
Which of the
original six cases
applies to this problem?
Case #1: object is located at infinity.
Case #2: object is located in region I.
Case #3: object is located on the line between regions I and II, exactly two focal lengths in front of the lens.
Case #4: object is located in region II.
Case #5: object is located on the line between regions II and III, exactly one focal length in front of the lens.
Case #6: object is located in region III.
What is the focal length of the lens?
Is the image real or virtual? upright or inverted?
What is the magnification?
Refer to the following information for the next four questions.
A light bulb is placed 300 cm from a convex lens of focal length 50 cm.
Which of the
original six cases
applies to this problem?
Case #1: object is located at infinity.
Case #2: object is located in region I.
Case #3: object is located on the line between regions I and II, exactly two focal lengths in front of the lens.
Case #4: object is located in region II.
Case #5: object is located on the line between regions II and III, exactly one focal length in front of the lens.
Case #6: object is located in region III.
Calculate where the image is formed.
Is the image real or virtual? upright or inverted?
What is the magnification?
Refer to the following information for the next four questions.
A light bulb is placed 300 cm from a convex lens of focal length 500 cm.
Which of the
original six cases
applies to this problem?
Case #1: object is located at infinity.
Case #2: object is located in region I.
Case #3: object is located on the line between regions I and II, exactly two focal lengths in front of the lens.
Case #4: object is located in region II.
Case #5: object is located on the line between regions II and III, exactly one focal length in front of the lens.
Case #6: object is located in region III.
Calculate where the image is formed.
Is the image real or virtual? upright or inverted?
What is the magnification?
Refer to the following information for the next six questions.
A slide is placed 50 mm from a projector's lens. Despite all efforts, no clear, crisp, focused image can be produced on a screen regardless of the projector's distance from the screen.
Which of the
original six cases
applies to this problem?
Case #1: object is located at infinity.
Case #2: object is located in region I.
Case #3: object is located on the line between regions I and II, exactly two focal lengths in front of the lens.
Case #4: object is located in region II.
Case #5: object is located on the line between regions II and III, exactly one focal length in front of the lens.
Case #6: object is located in region III.
Calculate the focal length of this original lens.
If the slide remains in the same location but a second lens having a focal length of 49.6 mm is substituted for the original lens, at what distance from the projector should the screen now be placed to produce a focused image?
What is the magnification?
Which of the
original six cases
applies to this problem?
Case #1: object is located at infinity.
Case #2: object is located in region I.
Case #3: object is located on the line between regions I and II, exactly two focal lengths in front of the lens.
Case #4: object is located in region II.
Case #5: object is located on the line between regions II and III, exactly one focal length in front of the lens.
Case #6: object is located in region III.
How should the slide be placed into the projector so that the image on the screen is "correct?"
Related Documents
Lab:
Labs -
A Simple Microscope
Labs -
Blank Ray Diagrams for Converging Lenses
Labs -
Blank Ray Diagrams for Converging, Concave, Mirrors
Labs -
Blank Ray Diagrams for Diverging Lenses
Labs -
Blank Ray Diagrams for Diverging, Convex, Mirrors
Labs -
Determining the Focal Length of a Converging Lens
Labs -
Index of Refraction: Glass
Labs -
Index of Refraction: Water
Labs -
Least Time Activity
Labs -
Man and the Mirror
Labs -
Man and the Mirror: Sample Ray Diagram
Labs -
Ray Diagrams for Converging Lenses
Labs -
Ray Diagrams for Converging Mirrors
Labs -
Ray Diagrams for Diverging Lenses
Labs -
Ray Diagrams for Diverging Mirrors
Labs -
Reflections of a Triangle
Labs -
Spherical Mirror Lab
Labs -
Student Lens Lab
Labs -
Target Practice - Revised
Resource Lesson:
RL -
A Derivation of Snell's Law
RL -
Converging Lenses
RL -
Demonstration: Infinite Images
RL -
Demonstration: Real Images
RL -
Demonstration: Virtual Images
RL -
Dispersion
RL -
Diverging Lenses
RL -
Double Lens Systems
RL -
Lensmaker Equation
RL -
Mirror Equation
RL -
Properties of Plane Mirrors
RL -
Refraction of Light
RL -
Refraction Phenomena
RL -
Snell's Law
RL -
Snell's Law: Derivation
RL -
Spherical Mirrors
RL -
Thin Lens Equation
Review:
REV -
Drill: Reflection and Mirrors
REV -
Mirror Properties
REV -
Physics I Honors: 2nd 9-week notebook
REV -
Physics I: 2nd 9-week notebook
REV -
Spherical Lens Properties
Worksheet:
APP -
Enlightened
APP -
Reflections
APP -
The Librarian
APP -
The Starlet
CP -
Lenses
CP -
Plane Mirror Reflections
CP -
Refraction of Light
CP -
Snell's Law
CP -
Snell's Law
NT -
Image Distances
NT -
Laser Fishing
NT -
Mirror Height
NT -
Mirror Length
NT -
Reflection
NT -
Underwater Vision
WS -
An Extension of Snell's Law
WS -
Basic Principles of Refraction
WS -
Converging Lens Vocabulary
WS -
Diverging Lens Vocabulary
WS -
Lensmaker Equation
WS -
Plane Mirror Reflections
WS -
Refraction and Critical Angles
WS -
Refraction Phenomena
WS -
Refraction Through a Circular Disk
WS -
Refraction Through a Glass Plate
WS -
Refraction Through a Triangle
WS -
Snell's Law Calculations
WS -
Spherical Mirror Equation #1
WS -
Spherical Mirror Equation #2
WS -
Spherical Mirrors: Image Patterns
WS -
Thin Lens Equation #1: Converging Lenses
WS -
Thin Lens Equation #2: Converging Lenses
WS -
Thin Lens Equation #3: Both Types
WS -
Thin Lens Equation #4: Both Types
WS -
Two-Lens Worksheet
WS -
Two-Mirror Worksheet
TB -
27B: Properties of Light and Refraction
TB -
Refraction Phenomena Reading Questions
PhysicsLAB
Copyright © 1997-2022
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton