Light

1. Reflection

1.1. reflection of light

1.1.1. 5 characteristics of a plane mirror image

1.1.1.1. same size

1.1.1.2. virtual

1.1.1.3. upright

1.1.1.4. laterally inverted

1.1.1.5. distance of object from mirror = distance of image from mirror

1.1.1.5.1. Draw ray diagram for mirror

1.2. Angles are measured TO the normal.

2. Refraction

2.1. refraction of light

2.1.1. Apparent depth

2.1.1.1. Draw ray diagram in water

2.2. When light enters the glass block at A, it is moving from a less dense medium to a denser medium. Hence, the ray of light will bend towards the normal.

2.3. When the ray of light exits the glass block at B, it is moving from a denser medium to a less dense medium. Hence, it will bend away from the normal.