DETERMINATION OF FOCAL LENGTH OF A LENS USING OPTICAL BENCH
The focal length of an optical system is a measure of how strongly the system converges or diverges light. For an optical system in air, it is the distance over which initially collimated rays are brought to a focus. A system with a shorter focal length has greater optical power than one with a long focal length; that is, it bends the rays more sharply, bringing them to a focus in a shorter distance. The focal point of a lens is found by allowing a bundle of mutually parallel rays to enter the lens (i.e., from an object infinitely far from the lens). The lens alters the direction of these rays, making them emerge as a convergent or divergent bundle. The point to which they converge (or from which they diverge) is called the focal point. In physics, there are so many methods of determining the focal length of a lens, In this work, the student will determine the focal length of a given lens by using an optical bench to make measurements of object and image distances which is the objective of the work.
TABLE OF CONTENTS
Cover Page
Title Page
Approval Page
Dedication
Acknowledgment
Abstract
Table of Contents
CHAPTER ONE
1.0 Introduction
1.1 Background of the study
1.2 Aim/objective of the study
1.3 Significance of the study
1.4 Scope of the study
1.5 purpose of the study
1.6 Limitation of the study
CHAPTER TWO
2.0 Literature Review
2.1
Historical background of the study
2.2
Description of optics bench
2.3
Types of optical lens
CHAPTER THREE
3.0 Methodology
3.1
Equipment used
3.2
Procedure to set up the optics bench
3.3
Procedure to determine the focal length 75mm lens
3.4
Procedure to determine the focal length of the 150mm lens
3.5
Scaled Lens Diagrams
3.6
Affect of Covering the Lens
3.7
Magnification of the Image
CHAPTER FOUR
4.0 Result analysis
4.1 experiment observation
CHAPTER FIVE
- Discussion, Conclusion and Recommendation
- Conclusion
- Recommendation
- References
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