lecture 4

# lecture 4 - The law of reflection 1 = 1 The law of...

This preview shows pages 1–11. Sign up to view the full content.

1 The law of reflection: 1 1 θ θ = The law of refraction: 2 2 1 1 sin sin n n θ θ = Snell’s Law Image formation

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

View Full Document
2 Ray Optics - Applications: Image Formation Chapter 23
3 object real image virtual image Images are always located by extending diverging rays back to a point at which they intersect Images are located either at a point from which the rays of light actually diverge or at a point from which they appear to diverge To find the image it is usually enough to find intersection of just two rays! Magnification = image height object height

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

View Full Document
4 Flat Refracting Surface 1 θ 2 θ 2 2 1 1 sin sin n n θ θ = Snell’s Law d 2 2 sin d q θ θ 1 1 sin d p θ θ 2 1 d d n n q p = 2 1 n q p n = Image is always virtual
5 Flat mirror Chapter 23

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

View Full Document
6 One ray starts at point P , travels to Q and reflects back on itself Another ray follows the path PR and reflects according to the law of reflection The triangles PQR and P’QR are congruent . - magnification is 1. Flat Mirror The law of reflection θ h h = always virtual image
7 Geometric Optics - Applications: Thin Lenses Chapter 36

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

View Full Document
8 Thin Lenses “Thin” means that the width is much smaller than the radius of curvature
9 Thin Lenses s s ? s = 1 1 1 s s f + = Thin Lens Equation: Object Distance Image Distance Focal Length The thin lens is characterized only by one parameter – FOCAL LENGTH .

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

View Full Document
10 Thin Lenses: Focal Length ? f = 1 2 1 1 1 ( 1) n f R R = - - n + - Strategy of Finding f : Define positive and negative sides - usually the left side (the side where the object is) is defined as a positive You are going from the positive side, then the first lens surface is defined as surface “1” with the radius of curvature and the center of curvature at point Sign rule: if is in the positive “side” if is in the negative “side” The same for the second surface: if
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern