How Color Affects Heating By Absorption Of Light

939 WordsMay 2, 20164 Pages
Purpose The purpose of this lab is to demonstrate how color affects heating by absorption of light. Background Information The electromagnetic spectrum is the range of wavelengths over which electromagnetic radiation extends (Merriam-Webster Dictionary). The visible part of the spectrum is light and we can see colors from blue to red. On the left side of the spectrum is blue where the wavelength is shorter. On the right side of the spectrum is red where the wavelength is much longer than the blue end. These wavelengths are called the visible spectrum and an example of this is a rainbow. For a light wave to be absorbed by an object, the single frequency light wave must come in contact with the object. Although light colors reflect part of the visible light, black absorbs all energy and wavelengths. Hypothesis If different colored pieces of construction paper are used, then the darkest piece will absorb the most light through the heat lamp after one hour. Materials 6 identical glass jars, 1 quart size, with lids 6 sheets of different colored construction paper (1 piece of red, orange, yellow, green, purple, and black) Scissors Tape 21 cups of water Mercury thermometer White modeling clay Heat lamp Timer Drill and 1/4 of an inch bit Procedure Gather all of the necessary materials. Drill a hole relatively larger than the thermometer in the lid of one of the jars. Only one lid needs to have a hole because the jars will be tested separately. Take a piece of construction

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