iGotcha! : [Physics] F4C5 : Lights 5.1 Part 1

5.1 - Understanding Reflection of Light ( Part 1 )

1. A plane mirror is a flat smooth surface which reflects most of the light falling on it.

2. Laws of reflection :

- The incident ray, the reflected ray, and the normal are all lie in the same plane.

- The angle of incidence = the angle of reflection.

3. Characteristics of an image formed in a plane mirror : -

- The image is virtual.

- The image is upright but laterally inverted.

- The size of the image is the same as the object.

- The distance between image and mirror is the same as the distance between object and mirror.

4. An image, which cannot be formed on a screen, is called a virtual image.

5. Lateral inversion = a left-right reversal

6. Upright = no top-bottom reversal

7. In general : -