Lesson 14 Key Concepts and Notes

1. Visible objects that are not light sources reflect light, but only those with very smooth surfaces act as mirrors.

2. The image produced by a plane mirror is upright.

3. The image produced by a plane mirror is reversed front to back (not reversed left to right).

4. The distance between an object and the reflective surface of a mirror is the same as the distance between the apparent position of the image in the mirror and the reflective surface of the mirror.

Lesson 14 Notes

1. All visible objects that are not light sources reflect light.

2. Nature of reflection is dependent on both color of the object and the texture of its surface Specular reflection: smooth surface (surface of a mirror); all rays hit the surface parallel to each other and remain parallel after reflection; angles of incidence and reflection are the same Diffuse Reflection: rough surface (surface of a screen); angles of incidence and reflection are all different Law of Reflection: The angle of incident (incoming ray) is equal to the angle of reflection (reflected ray)

3. Images in a plane mirror are reversed front to back.

4. Images form behind a mirror. a 4. Images form behind a mirror. a. Image: a picture of an object formed by a mirror or lens

5. Virtual image: image in a mirror a 5. Virtual image: image in a mirror a. An image that can be seen but cannot be projected onto a screen

6. Real image: one produced by pinhole or real camera a 6. Real image: one produced by pinhole or real camera a. An image produced when light from an object is focused onto a surface