Image formation

Optics. Image formation in spherical mirrors.An IM from my final demonstration in March 2013.

1. Image Formation on Spherical Mirrors

2. The center of curvature C is the center of the sphere where the mirror was taken. The vertex V is the center of the mirror. It is sometimes called the pole of the mirror. The radius of curvature R is the radius of the sphere. It is the distance between C and V. The principal axis P , or optical axis , is the straight line joining P and V. The aperture MN refers to the width of the mirror. The principal focus F is the point where the reflected rays seem to come from behind a diverging mirror. The focal length f is the distance from the vertex to the principal focus. Since the principal focus is midway between C and V, the focal length is one-half the radius of curvature; f= R   Parts of a Spherical Mirror

3. The Parallel Ray Method

4. 1. A ray passing through the center of curvature is reflected along itself. THE FOUR SPECIAL RAYS

5. 2. A ray parallel to the principal or optical axis is reflected through the principal focus in converging mirrors, or appears to come from the principal focus in diverging mirrors. THE FOUR SPECIAL RAYS

6. 3. A ray passing through the focus is reflected parallel to the principal or optical axis. THE FOUR SPECIAL RAYS

7. 4. A ray striking the vertex of the mirror is reflected at an equal angle on the opposite side of the principal axis . THE FOUR SPECIAL RAYS

8. PROBLEM: How are images formed in curve mirrors? MATERIALS: A. Learning Station 1 Meter stick Object lamp Ruler Concave mirror Meter stick Screen B. Learning Station 2 Object lamp Meter stick Ruler Convex mirror Meter stick Screen Activity No. 3 Preliminaries

9. Activity No. 3 Procedures Learning Station 1 Learning Station 2 Group 1 Group 2 After 10 Minutes Finished

10. EXPERIMENT TIME!

11. Concave Mirror Where must you place an object if you want to form an image that is upright and bigger than the object? Where must you place an object if you want to form a smaller image? Where can you place an object so that no image forms? Between which two points does an image form is virtual? Convex Mirror What kind of image is always formed on convex mirrors? Guide Questions

12. Have advance readings on Refraction of Light and answer the following questions : How is light refracted? What is the mathematical equation for the index of refration ? Refer to Physics : Science and Technology IV Textbook page ASSIGNMENT