The Electromagnetic Spectrum

The range of electromagnetic radiation in the electromagnetic spectrum is huge. Where does this radiation come from and how do the frequencies and wavelengths vary? Physics - Waves - Learning Points. Electromagnetic radiation is all around us and its power varies hugely. Electromagnetic radiation is measured on the electromagnetic spectrum. There are both natural and man-made sources . It can be beneficial, harmless or extremely dangerous to us. 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.