physics xf: camera & magnifier

7/28/2019 PHYSICS XF: Camera & Magnifier

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OPTICAL

INSTRUMENTS

By: Cynthia Meylinda Kevin - Rendy

CAMERA & MAGNIFYING GLASS


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MAGNIFYING GLASS

Magnifying glass is a convex lens thatis used to produce a magnifiedimage of anobject.The lens is usually mounted in

a frame with a handle
http://en.wikipedia.org/wiki/Lens_(optics)http://en.wikipedia.org/wiki/Magnificationhttp://en.wikipedia.org/wiki/Imagehttp://en.wikipedia.org/wiki/Lens_(optics)http://en.wikipedia.org/wiki/Lens_(optics)http://en.wikipedia.org/wiki/Imagehttp://en.wikipedia.org/wiki/Magnificationhttp://en.wikipedia.org/wiki/Lens_(optics)


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MAGNIF

YIN

G

GLASS

HISTORY

Roger Bacon

Lecturer

(University of Oxford)

Did various experiments

& described the

principles of reflectionand refraction

1250

His research was oriented by the legacy of

Alhazen

Made a start for microscopes, telescope

and spectacles invention


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MAGNIF

YIN

G

GLASS

CONCEPT

DOUBLE CONVEX LENS

The properties of image :

VIRTUALUPRIGHT

ENLARGED


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MAGNIF

YIN

G

GLASS

CONCEPT

OBJECTIVE LENSOCULAR LENS

foc > fob

fob > foc


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MAGNIF

YIN

G

GLASS

HOW IT WORKS?

f f 2f2f

Note : The image will be formed smaller if

its placed in the 3rd room.


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MAGNIF

YIN

G

GLASS

CALCULATION

Maximum Accommodation :

No Accommodation :

Accommodates in certain distance :


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MAGNIFYING

GLASS

CALCULATION

Sn = 25 cm

o

sh

25cm

Maximum Accommodatio

No Accommodation


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MAGNIFYING

GLASS

CALCULATIONMaximum Accommodation :

=


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MAGNIFYING

GLASS

CALCULATIONNo Accommodation :


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CALCULATION

Jessica reads a book using a magnifying glass with afocal point 2 cm and the near point of the eye known

is 25 cm.

Calculate the magnification of the object, on/if:

a. Maximum Accommodation

b. No Accommodation

c. Accommodate in 10cm distance


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CALCULATION

Known :- Focal point (f) = 2cm

-Sn = 25cm

Asked :

a) Max acc => M = 25cm

b) No acc => M = 25cm

c) 10cm acc => M = 25cm 25cm

2cm+ 1 = 13.5 x

2cm

= 12.5 x

2cm+

10cm= 15 x


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CALCULATION OPTICAL POWER OF LENS

dioptre / diopter

Andrehansen is using a microscope with a power

of lens 12.5 dioptre, an the nearest is 25cm. What

is the distance of the focus lens? The magnification

when the eyes accomodate maximumly? The

magnification when the eyes dont accomodate?

a)

b)

c)


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Camera is a device that

records images that can be stored directly,

transmitted to another location, or both.These images may be still

photographs or moving images such

as videos ormovies

C A M E R A
http://en.wikipedia.org/wiki/Imagehttp://en.wikipedia.org/wiki/Photographhttp://en.wikipedia.org/wiki/Videohttp://en.wikipedia.org/wiki/Movieshttp://en.wikipedia.org/wiki/Movieshttp://en.wikipedia.org/wiki/Videohttp://en.wikipedia.org/wiki/Photographhttp://en.wikipedia.org/wiki/Image


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HISTORY

CAMER

A

1814

Joseph Nicphore Nipce


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CAMER

A

HISTORY


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HISTORY

CAMER

A

Jacques Mand Daguerre

Daguerreotype Camera

1837


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CAMER

A

Daguerreotype Camera Works


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CAMER

A

HISTORY


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HISTORY

CAMER

A

William Henry Talbot

1841Calotype

HISTORY


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HISTORY

CAMER

A

1888

Eastman

Kodak roll film camera

HISTORY


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HISTORY

CAMER

A

HISTORY


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HISTORY

CAMER

A

Edwin Land

1948

HISTORY


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HISTORY

CAMER

A

HISTORY


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HISTORY

CAMER

A

1963Polaroid releases instant colour film.

1973

Polaroid develops one step instant colourfilm,shoot and print with one click.

1978Konica invents the point and shoot auto

focus camera

PARTS OF CAMERA


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PARTS OF CAMERA

CAMER

A

LENS

PENTAPRISM

MIRROR

SHUTTER

VIEWFINDER

APERTURE

FLASH

HOW IT WORKS?


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HOW IT WORKS?

CAMER

A


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TYPES

CAMER

A


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CALCULATION

CAMER

A


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CALCULATION

CAMER

A

Hansen bought old an SLR camera with a focal length of 80mm.

Hansen wants to take a picture of Meiga Tok who is 2m away

from the camera. Calculate:

a) The distance of the lens to the film so that the image of

Meiga Tok can be formed in the film.

b) The magnification.

a) Known:

f = 80mm

S = 2m = 2000mm

si = 83.3mm

b) Magnification


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