1. Chapter 7 Light and Geometric Optics

2. 7.2 Curved Mirrors

3. Types of Curved Mirrors
The images of CURVED MIRRORS are much different than what you are used to from a “regular,” plane mirrors
Curved mirrors can be used to form images that are larger or smaller than the object.

4. Types of Curved Mirrors
The images of CURVED MIRRORS are much different than what you are used to from a “regular,” plane mirrors
Curved mirrors can be used to form images that are larger or smaller than the object.
Concave Mirrors
Convex Mirrors

5. Types of Curved Mirrors
Concave Mirrors
Used whenever a magnified image of an object is needed
They can also produce inverted, small images
They produce “real images”
Real image = an image that can be projected onto a screen

6. Types of Curved Mirrors
The opposite of Concave Mirrors
They curve outwards in the opposite
direction of Concave Mirrors
Produce smaller images
A wider angle of view
Always produce virtual images
Convex Mirrors

7. Concave (Converging) Mirrors
Imaginary line drawn through the vertex (V)
Perpendicular to the surface of the mirror
Single Point through which rays parallel to PA will reflect
The distance between the Vertex and the Focal Point

8. Concave (Converging) Mirrors
Represents the centre of the sphere from which the curved mirror was cut
Represents the distance from the centre of curvature to the mirror surface

9. Where Will an Image Form?
Ray 1 and Ray 2 = follow the Law of Reflection
Ray 3 = any ray travelling through F to the V will be reflected right back

10. Where Will an Image Form?
Step #1:
Draw a ray from the top and bottom of an object parallel to the PA.
Its reflection from the mirror must pass through the F
f = R/2

11. Where Will an Image Form?
Step#2:
Draw a ray from the top and bottom of an object that passes through the F
Its reflection from the mirror must be parallel to the PA.
All rays MUST CONVERGE at the Focal Point (F)

12. Where Will an Image Form?
Step#2:
Draw a ray from the top and bottom of an object that passes through the F
Its reflection from the mirror must be parallel to the PA.
All rays MUST CONVERGE at the Focal Point (F)

13. Characteristics of the Image
TYPE: real
ATTITUDE: inverted
MAGNIFICATION: smaller than the object
POSITION: Closer to the mirror

14. Characteristics of the Image
TYPE: real
ATTITUDE: inverted
MAGNIFICATION: smaller than the object
POSITION: Closer to the mirror, between C and F

15. real
inverted
smaller than the object
Between C and F
real
inverted
Same size as the object
At C
real
inverted
larger than the object
To the left of C

16. The Concave Mirror as a Magnifier
When the object is between F and the mirror
TYPE: virtual
ATTITUDE: upright
MAGNIFICATION: larger than the object
POSITION: behind the mirror

17. Can You Predict The Location Of An Image Formed By A Concave Mirror?
The Mirror Equation
Can You Predict The Location Of An Image Formed By A Concave Mirror?

18. A concave spherical mirror has a focal length of 10. 0 cm
A concave spherical mirror has a focal length of 10.0 cm. Locate the image of a pencil that is placed upright 30.0 cm from the mirror. Draw a ray diagram to confirm your answer.

19. Practice Problems 7.2.1 (all)