What is Light? - Light Energy

We can see our surroundings because of light energy. Whether light waves are being emitting from a source or being reflected, this form of energy is vital to life on Earth. Physics - Waves - Learning Points. Light is an energy that surrounds us, essential for our vision. Only a fraction of the electromagnetic spectrum is visible to humans. We mostly see sunlight reflected off objects and surfaces. Luminance depends on how far light has travelled from the source. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.