Physics - Light - Introduction - Sources of light - All About Light
A 4-step lesson for young learners. Step 1: 'Light is a form of energy that lets us see. It travels very fast - the fastest thing in the universe! (300,000 km per second)' Step 2: 'Luminous objects make their own light: Sun, stars, light bulbs, fire, glow sticks, LED screens. Non-luminous objects ar