chapter36_thin%20lens%202

chapter36_thin%20lens%202 - Chapter 36 Image Formation 2 1....

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 36 Image Formation 2 1. Thin Lens 2. Multi lens/mirror system
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Spherical mirror formulas 1 1 1 p q f + = I O h q M h p = - Object distance, image distance and focal length: Focal length and sphere radius: 2 R f = Object distance, image distance and magnification: 2 R f = - Converging mirror Diverging mirror
Background image of page 2
The lens maker’s formula (lens in vacuum or air) - - = 2 1 1 1 1 1 R R ) n ( f n : index of refraction of the lens material. R 1 : radius of near surface. R 2 : radius of far surface. The sign conventions for the radii of the two surfaces: 1. The near or far surface of the lens is with respect to the focal point F . Near side is surface 1, far side is surface 2. 2. The sign of the radius is then defined as: + ” if the center is on the far side; “ - ” if the center is on the near side 1. In this convention, positive f means converging lens, negative f means diverging lens. F near surface far surface
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
More examples
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Steps to determine the signs c Pick up the focal point, hence the focal length in question. c Mark the near surface S 1 , and far surface S 2 . c Based on the curve of these two surfaces, mark the center C 1 for S 1 and C 2 for S 2 . c Mark R 1 for S 1 and R 2 for S 2 . c Now decide on the sign of R 1 and R 2 , based on its center on far side (+) or near side (-).
Background image of page 6
- - = 2 1 1 1 1 1 R R ) n n ( f medium lens F near surface far surface n medium The lens maker’s formula (lens in a medium)
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 23

chapter36_thin%20lens%202 - Chapter 36 Image Formation 2 1....

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online