Reveals the science behind light, discussing where light comes from, why rainbows occur, how cameras work, why people and animals need sunlight, and other related topics.

What is light? -- Where does light come from? -- What makes a shadow? -- What is light made of? -- How do we see light? -- What are colours? -- Can light bend? -- How fast does light travel? -- How far can light reach? -- Which animals make light? -- How can light make electricity? -- How can light make photographs? -- Why do living things need light?