Do Now:

A 2.25 cm object is 8.5 cm to the left of a concave mirror of 5.5 cm focal length.

1. Find the image position2. Find the image height

Do Now:

A 3.5 cm object is 9 cm to the left of a concave mirror of 6 cm focal length. The image is located 18 cm from the mirror. Find the image height.

Do Now (5/14/12):1. Copy the following diagram exactly

onto your paper. 2. Draw a ray diagram and locate the

image3. Is the image reduced or enlarged?4. Is the image upright or inverted?

C F

Single Mirror Propertiesdo di m imagedo>C C>di>f Reduced,

invertedReal

C>do>f di>C Enlarged, inverted

Real

f>do (negative)

Enlarged Virtual

oi dd

For mirrors:

Lenses

LensA piece of transparent material

used to focus light and form an image◦Convex: thicker at the center◦Concave: thinner at the center

Lens Equations – same as Mirror Equations!

Thin Lens Equation

Magnification

io ddf

111

o

i

o

i

d

d

h

hm

Image Formation:

Ray Diagrams Step 1:

Ray Diagrams Step 2:

Ray Diagrams

D. Image at F

E. Object in front of F

Tomorrow:Short quiz on diagrams:

◦One mirror diagram◦One lens diagram

Bring any work you have done so far on your next art piece; I will have materials also

Practice:Complete BOTH SIDES of the

Lens Diagram sheet; it is due by the end of class

Once you finish, you may work on homework or Mirror diagram sheets

Prepare for quiz tomorrow

Do Now (5/15/12):1. Copy the following lens diagram

exactly onto your paper. 2. Draw a ray diagram and locate the

image3. Is the image reduced or enlarged?

upright or inverted? Real or virtual?

C FF

Do Now (5/17/12): Fill in the blank

1. Dispersion is the splitting of _________ into its _____________.

2. The index of refraction “n” is always greater than _______.

3. The speed of light is constant in _____.

4. ___________does not change as light moves to another medium.

Unit 5: LightThe electromagnetic spectrum

◦ Types of rays◦ Uses◦ Approximate sizes

Light behavior◦ Reflection◦ Refraction◦ Diffraction/dispersion

Mirrors◦ Equations◦ diagrams

Lenses ◦ Equations (same as mirror)◦ Diagrams

Practice:Use the rest of class to work on

your review packetIt is due next Friday, but

remember… this is a very big unit and you will not come to this class every day next week! Use this time to review

You may also work on your art piece

If you need any previous slide shows, please let me know

Do Now (5/18/12):

Pass in your Do Now’s and wait quietly for instructions. Happy Friday!