Different kinds of light are all around you everyday but are invisible to the human eye, from the radio waves that carry your favorite songs, to the x-rays doctors use to see inside of you, to the microwaves that heat up your food.
À nossa volta, todos os dias, há diferentes tipos de luz que são invisíveis aos olhos humanos: as ondas de rádio que trazem as nossas canções preferidas os raios X que os médicos usam para verem o nosso interior, as micro-ondas que aquecem a comida.