Activity 5: Light Has Fingerprint? We have seen that when light strikes an object, some of the light is absorbed by the object and some of the light is reflected off of the object. By sorting the different parts of light that are reected off an object, scientists are able to uncover the chemical composition of the object. The drawing below shows what the sorted light looks like. This type of picture is called a line spectra. Each line represents a different part of the light given off by the object. Together the lines make up a signature (like a nger print} that identifies the specic chemical composition of the observed object. A. Take a moment and study the different line spectra provided in the Spectral Catalog [see end of document]. In the blank box below, sketch the line spectra that a satellite would detect if it were pointed at a freshwater lake. Explain the reasoning behind your choice. Images of an object taken using remote sensing devices often use different colors to represent specic information about an observed object. You ma},r have seen an example of this when looking at a map or picture of Earth. Often mountain regions are shown in brown while lowlands and valleys are shown irl green. These colors do not represent the actual color of the region but rather have been altered to illustrate the elevation of the different areas. An image that has had colors added to it to represent specific features, like elevation or temperature or chemical composition, is called a false color image- Examine the following false color image