Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Understanding Positive and Negative Lenses and Formation of Images, Slides of Physics

An in-depth exploration of optics, focusing on the concepts of positive and negative lenses, their properties, and the formation of real and virtual images. It covers the behavior of rays passing through a lens, the concept of focal plane, and the impact of underwater environments on lens functionality.

Typology: Slides

2012/2013

Uploaded on 07/12/2013

madangopal
madangopal 🇮🇳

4.7

(9)

99 documents

1 / 8

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Focus
Docsity.com
pf3
pf4
pf5
pf8

Partial preview of the text

Download Understanding Positive and Negative Lenses and Formation of Images and more Slides Physics in PDF only on Docsity!

Focus

Distant Source

^

An object moved far to theleft approaches a parallel raysource.^ •^

s^ = o^

∞.

^

The image approaches thefocal point

f^ of the lens.

^  

2 1

R

R

n f

s^ o

R^2

R^1

f

object

image

Negative Lens

^

A biconcave lens is anegative lens.•^

Both terms are negative

-^

R^1

< 0 and

R^2

0

-^

Diverging lens

-^

Focal length is negative

^   

2 1

R

R

n

f

s^ o

R^1

R^2

f

object

image

Focal Plane

^

Parallel rays may enter thelens at a small angle.•^

Focal points on a line

^

This defines the focal plane.

s^ o

R^2

R^1

f

object

image

Real Image

Rays through a converging lens can meet at a focalplane and form a real image.•

Object between

f^ and

2 f

from the lens forms past

2 f

on far side

-^

Screen elsewhere has blurred image

Thin lensequation

f s s^

i o

Virtual Image

Rays through a diverging lens create no real image.•

Virtual image from apparent origin• Focal length and image point are negative

next

f s s^

i o