UNIT 11 – LENSES AND MIRRORS
Name ___________________
“Oh, Diamond! Diamond! thou little knowest what mischief thou hast done!” - Newton
Day Day
1
Review Light and Color Test
What is an Object?
What Does an Eye Do?
Law of Reflection
Image Formation in Plane Mirrors
2
Laser Croquet
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Plane Mirror Demos
Diffuse Reflection
Concave Mirrors
Parabolic vs Spherical Mirrors
Convex Mirrors
Mirror Ray Tracing
50% Silvered Mirror
Mirror Ray Tracing Practice
Mirror Equation: 1/di + 1/do = 1/f
Curved Mirror Lab
Warmup: ¼ = ½ + 1/x
Warmup: What kind of mirror is a
side-view mirror?
Magnification Equation: M = hi/ho = di/do
Finish Curved Mirror Lab
Reflection Mini-Test
Lifeguard Theorem
Laser Demo: Reflection & Refraction
Speed of Light in a Material
Tires Analogy
Snell’s Law
Speafisherman
Refraction Lab
Review Lab
Quiz!
TIR
Critical Angle
Sitting in the Bottom of the Pool
Diamonds
Fiber Optics
Demos: TIR Goggles, Extremely Thick
Eyeglasses, Different Sized Eyeballs?
Lens Raytracing: Through Vertex,
Parallel and Thru f
Review TIR and Lenses HW
Eyes: Normal, Nearsighted,
Farsighted
Fresnel Lenses
Starting Fires with Lenses
Lens Equations: 1/di + 1/do = 1/f, M
= hi/ho = -di/do
Review
Refraction Mini-Test
Homework
Reflection WS Side 1
Finish Laser Croquet
Questions
Reflection WS Side 2
Curved Mirrors WS #1-7
Extra Practice
Physics Classroom – Reflection –
Lesson 1a,b,c, Lesson 2
Physics Classroom – Reflection –
Lesson 1d
Physics Classroom – Reflection –
Lesson 3
Physics Classroom – Reflection –
Lesson 4
Curved Mirror WS #8-15
Extra Credit: Tree Drawing
Mirror/Lens Review Sheet First 4 Questions
Refraction WS
Finish Refraction Lab
TIR WS – Front Side
Physics Classroom – Refraction –
Lesson 1a,b
Physics Classroom – Refraction –
Lesson 1c,d
Physics Classroom – Refraction –
Lesson 1e
Physics Classroom – Refraction –
Lesson 3
Physics Classroom – Refraction –
Lesson 2
TIR WS – Back Side
Lenses HW #1-4
Physics Classroom – Refraction –
Lesson 5
Finish Lenses HW
Physics Classroom – Refraction –
Lesson 6
Finish Lenses and Mirrors
Review
BIG IDEAS (Courtesy of Newton’s “Opticks”)
Object
 A thing that sends light rays diverging in all
directions
 EVERY POINT on the object sends rays in all
directions. It would take forever to draw every
ray coming from every point, so we just chose a
few points.
Eye
 A thing that focuses diverging rays
 By ray diagramming from a few points on the
object, we can figure out where the image
appears on the back of the eye.
 Images are always flipped!
Reflection
Refraction
Law of Reflection: Incident Angle = Reflected Angle
Snell’s Law (Law of Refraction): ni sin i  nr sin  r
Concave (Converging) Mirror:
Convex (Converging) Lens:
Total Internal Reflection
 All light is reflected back into the first material
 Occurs if
1. n1  n2 , and…

2. 1   c for the two materials
Critical Angle is determined by…
n1 sin  c  n2 sin 90 