caption: Chapter 4: Light Discuss why the sky is blue, sunset, rainbows
exif: {"Image DocumentName": "Chapter 4: Light Discuss why the sky is blue, sunset, rainbows", "Image ImageDescription": "bring prism, diffraction gratings, and telescopes. We take light for granted. Without light we would all be in the darkness, we would have no concept of color. Light seems so simple, but it is one of the most complicated and fascinating topics. Without light, we couldn\u2019t see, but more fundamental than that, without light, life would not be able to exist. We need light in order to live. Plants need light to live. We need light in order to start a fire, to cook. Light is all around us. And light provides us with information. And since astronomy is not like other sciences where you can see and touch what you are studying, astronomers depend on something that can traverse large distances and reach them. This special something is light. Astronomers gain all of the information from objects in space from the light that they emit. By studying light we can find out all sorts of information about the object. Since light is so important for gaining information, it is fitting that we devote a chapter to discussing the properties of this mysterious and fascinating thing we call life.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}