Silverman 
Vamos a investigar la luz [PDF ebook] 
Let’s Investigate Light

With An Emphasis On How Important Light Is To Our Earth, This Title Explains How Light Effects Photosynthesis, How Light Travels, The Different Properties Of Light And How Both Animals And People Depend On It. Whether It »s Ultraviolet Light That Help Bees Pollinate Flowers To Solar Panels That Use The Sun »s Light To Heat Our Homes, It »s All Addressed In This Beautifully Illustrated Book.