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Lecture 25: July 27 th 2009

Explore image formation by refraction on spherical surfaces, magnification, and ray diagrams for thin lenses in optics physics. Understand sign conventions and solve problems like apparent thickness of glass plate viewed through water straight above. Learn to calculate image distance in lenses with two refracting surfaces and follow the path of outgoing rays to locate virtual image.

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Lecture 25: July 27 th 2009

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  1. Lecture 25: July 27th 2009 Physics for Scientists and Engineers II Physics for Scientists and Engineers II , Summer Semester 2009

  2. Image Formation by Refraction on Spherical Surface Physics for Scientists and Engineers II , Summer Semester 2009

  3. Image Formation by Refraction on Spherical Surface Physics for Scientists and Engineers II , Summer Semester 2009

  4. Magnification for Refraction on Spherical Surface Physics for Scientists and Engineers II , Summer Semester 2009

  5. Sign Conventions for Refracting Surfaces Physics for Scientists and Engineers II , Summer Semester 2009

  6. Flat Refracting Surfaces Note: The sign of q is always opposite that of p  image and object are always on the same side for flat surfaces. Physics for Scientists and Engineers II , Summer Semester 2009

  7. Problem 20 of Chapter 36: What is the apparent thickness of the glass plate when viewed from straight above the water? Example: Flat Refracting Surfaces Physics for Scientists and Engineers II , Summer Semester 2009

  8. Problem 20 of Chapter 36: What is the apparent thickness of the glass plate when viewed from straight above the water? Example: Flat Refracting Surfaces Physics for Scientists and Engineers II , Summer Semester 2009

  9. Lenses A lens is basically an object with two refracting surfaces through which light passes. We start with two spherical surfaces having radii R1 and R2. How to calculate the image distance? Use the image created by surface 1 as the object for surface 2. Physics for Scientists and Engineers II , Summer Semester 2009

  10. ….and when the first image is real….. Lenses Physics for Scientists and Engineers II , Summer Semester 2009

  11. THIN Lenses Physics for Scientists and Engineers II , Summer Semester 2009

  12. Sign Conventions for Thin Lenses Note: Lenses always have TWO focal points (one for each direction of incident light). Physics for Scientists and Engineers II , Summer Semester 2009

  13. Ray Diagrams for Thin Lenses Physics for Scientists and Engineers II , Summer Semester 2009

  14. Ray Diagrams for Thin Lenses You need to trace outgoing rays back to where they seem to come from to find the virtual image location. Physics for Scientists and Engineers II , Summer Semester 2009

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