1. Print: 8
Demo:

2. Warmup
Draw a fully-labeled Ray Diagram to show the image. Then fill in the blanks below:
Type of mirror: S A L T

3. Agenda
See Snowflake image
Set quiz date
Magnification worksheet

4. How do you find the focus?
f = focal length
di = image distance
do = object distance

5. Examples
A convex mirror has an image distance of 32 cm and an object distance of 18 cm.
Find the focal length.
A concave mirror has a focal length of 15cm. An object with a height of 4 cm is placed 45.0 cm in front of the mirror. Calculate the image distance.

6. Example
Find di and hi for the configuration below.
di =
hi =

7. Example
Find di and hi for the configuration below.
di =
hi =

8. Magnification
The ratio of the size of an image to the size of an object.
m = magnification
di = image distance hi = image height
do = object distance ho = object height

9. Examples
A photo needs to be enlarged 5 x larger. It is 18 inches tall,
What is the magnification?
How tall will it be when it is finished?
A microscope produces an image that is 1.00x10-4 m high from an object that is 4.00 x 10-7 m high. What is the magnification of the microscope?

11. Example Problem
A concave mirror has a focal length of 12 cm. An object with a height of 2.5 cm is placed 40.0 cm in front of the mirror. Calculate the image height.

12. Equations and Convex Mirrors
Equations are the same for concave mirrors
Since the focal point is behind the mirror, the focal length, f, for a convex mirror is negative

13. Convex Example
A convex surveillance mirror in a convenience store has a focal length of m. A customer, who is 1.7 m tall, is standing 4.5 m in front of the mirror. Calculate the image distance.

14. Convex Example
A convex surveillance mirror in a convenience store has a focal length of m. A customer, who is 1.7 m tall, is standing 4.5 m in front of the mirror. Calculate the image height.