Spherical refracting surfaces  -  Six cases
This presentation is the property of its rightful owner.
Sponsored Links
1 / 14

Spherical refracting surfaces - Six cases PowerPoint PPT Presentation


  • 37 Views
  • Uploaded on
  • Presentation posted in: General

Spherical refracting surfaces - Six cases. Sign Convention to be used in the optics equations: The object distance p is positive for a real object. It would be negative for a virtual object, but that is a rare situation.

Download Presentation

Spherical refracting surfaces - Six cases

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Spherical refracting surfaces six cases

Spherical refracting surfaces - Six cases


Spherical refracting surfaces six cases

  • Sign Convention to be used in the optics equations:

  • The object distance p is positive for a real object. It would be negative for a virtual object, but that is a rare situation.

  • The image distance i is positive for a real image and negative for a virtual image.

  • Radii of curvature get their sign based on whether the centers of curvature are on the “R-side” or “V-side”.

From posted “Practical Rules” on Lecture Materials page:


Spherical refracting surfaces six cases

V-side

So

r < 0

R-side,

So

i > 0

V-side

R-side

So

r > 0

i > 0

Note: p > 0 since the object is real.


Spherical refracting surfaces six cases

V-side

So

r < 0

i < 0

V-side

So

i < 0

R-side

R-side

So

r > 0


Spherical refracting surfaces six cases

V-side

So

i < 0

R-side

So

r > 0

V-side

So

r < 0

i < 0

R-side


Spherical refracting surfaces six cases

Converging Lens (f > 0)

Focal point

Diverging Lens (f < 0)


Spherical refracting surfaces six cases

Converging Lens

f > 0

Focal point

f < 0

Diverging Lens


Spherical refracting surfaces six cases

Converging Lens

f > 0

Focal point

f < 0

Diverging Lens


Spherical refracting surfaces six cases

R-side

V-side

V-side

R-side

R-side

V-side

Locating the Image

(From posted “Practical Rules” on Lecture Materials page)


Spherical refracting surfaces six cases

Magnifying glass

Typical “near point”

Angular magnification


Spherical refracting surfaces six cases

Simple thin-lens microscope

Not to scale.

s = “tube length”

The eyepiece acts as a magnifying glass for the image from the objective lens. The final magnification M is the product of the lateral magnification m of the objective lens and the angular magnification m of the eyepiece.


Spherical refracting surfaces six cases

Angular magnification

Refracting telescope

ey

Not to scale.

A distant object subtends an angle ob. The virtual image viewed through the telescope subtends ey.


Spherical refracting surfaces six cases

Eyeglasses

myopic eye (shortsighted)

corrected with diverging lens

hyperopic eye (farsighted)

corrected with converging lens


  • Login