Unit 4: The way we see things

How light travels from sources to our eyes, mirrors and reflection, seeing behind you, shiny surfaces, and light bending.

• 4.1 Light travels from a source – We see things when light enters our eyes.
• 4.2 Mirrors – Mirrors bounce light in a neat, predictable way.
• 4.3 Seeing behind you – Use mirrors to see round corners and over walls.
• 4.4 Which surfaces reflect light best? – Shiny and smooth, or dull and rough?
• 4.5 Light changes direction – Light bends when it goes into water or glass.