This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Lecture 13 9. Optical Systems 9.3 Magnifcation 9.4 Magnifer Glass and other eyepieces 9.5. Microscope 9.6. Telescope 9.3. Magnifcation • Defnition oF magnifcation For optical systems – In the optical system we are discussing in the Following we are dealing with virtual objects – which are real on our retina The angle by which the beams enter the eye needs to be increased such that the image points are Further apart on the retina ! u ! a Magnifcation MP = size on retina with instrument size on retina without = " a " u = y a y u y a y u " u " a 9.3. MagniFying Glass Unaided eye Aided eye " u = y o d o " a = y i L MP = y i d o Ly o And not: y i y o MP = y i d Ly o MP = " s i d Ls o = d o ( ) L 1 " s i f # $ % & ’ = d o ( ) L 1 + 1 f L " l ( ) # $ % & ’ We put lens using very close to the eye: l=0 In order to have a comfortable observation L=25cm MP = 25 cm [ ] f cm [ ] + 1 = 0.25 D + 1 For L = " MP = d o cm [ ] f cm [ ] = d o D In our experiment 25cm MP = s i s o = 1 " s i f = 1...
View Full Document
This note was uploaded on 08/06/2008 for the course PHYS 352 taught by Professor Dierolf during the Fall '04 term at Lehigh University .
- Fall '04