1. Lesson 15 Key Concepts and Notes

2. Plane mirrors reflect light.1.
Plane mirrors reflect light.

3. 2.
A ray of light striking and reflecting from a mirror can be divided into two parts; an incident ray and a reflected ray.

4. 3
The angle of incidence and the angle of reflection are measured from the normal, which is a line perpendicular to the plane of the mirror at the point of incidence.

5. 4
The angle of incidence and the angle of reflection have the same value. This is referred to as the “law of reflection.”

6. 5
Light can be reflected from one mirror to another.

7. 6
The image seen in a plane mirror is a virtual image. Virtual images can be explained using the law of reflection.

8. Lesson 15 Notes

9. Incident ray: incoming ray that strikes the object1.
Incident ray: incoming ray that strikes the object

10. 2.
Reflected ray: outgoing ray that is reflected from the object

11. 3.
Normal: Line perpendicular to the plane of the mirror.

12. Angle of Incidence: angle between the incoming ray and the normal4.
Angle of Incidence: angle between the incoming ray and the normal

13. 5.
Angle of Reflection: angle between the outgoing ray and the normal