# Focal Length of Lenses

Anonymous

### Question Description

make sure to complete calculation tables, and

create a one page summary on the experiment.

Questions and Data tables are attached below as well as some additional notes.

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achiaovintel
School: Duke University

hello, kindly find the attached solution. In case of any question feel free to ask. Thank you

Running Head: FOCAL LENGTH OF LENSES

Focal Length of Lenses
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1

FOCAL LENGTH OF LENSES

2

Introduction
Images formed by lenses are either virtue or real. A converging lens forms a real image
while a diverging lens forms a virtue image. When a beam of light is incident to the converging
lens with ray parallel to the central axis of the lens the rays converges at a point called focal
point (Camacho, 2002). The focal length is the distance between the focal point and the center of
the lens. The focal length is taken as positive for a converging lens and negative for a diverging
lens. When a beam of light is incidence to a diverging lens the rays diverge as they leave the
lens. The outgoing rays behave as if they are emerging from a common source. This point is the
focal point of the diverging lens. The equation 1 shown below is relationship between the radius
of curvature, refraction index and the focal length of a given lens.
1
1
1
= (1 − n) ( − ) … … … … … … … . . equation 1
f
R1 R2
Where:
F = focal length, n = refraction index,

The distance of the object from the lens is denoted as p while that of the image to the lens is
denoted as q. The relationship between the two distances and the focal length is given by
equation 2 below
1...

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