Making An Ultra Violet Uv Light Detector-Books Pdf

Making an Ultra Violet UV Light Detector
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deeper red will be observed when the bead is placed uncovered in direct sunlight as opposed. to a lighter red if the same bead was covered by a piece of tinted glass and then placed in. direct sunlight , Engineering Category, Category 1 Relates science concept to engineering. sunlight ultra violet light UV, Educational Standards. New York science 2008 S1 1a b c Formulate questions of scientific inquiry with the aid. of references appropriate for guiding the search for explanations of everyday observations . New York science 2008 S3 1a b Employ tools to gather analyze and interpret data . New York science 2008 S3 2a b c Use data to construct reasonable explanations . Evaluate your hypothesis in light of the data , Pre Requisite Knowledge. Learning Objectives, After this activity students should be able to . Give examples of the different types of light that are contained in sunlight . Give an example of a device that can detect an invisible type of light . Explain the fundamental difference between different types of light . Based on their observations should be able to list materials are good and bad at blocking. Materials List, Each group needs , 1 pipe cleaner www teachersource com 3 25 for package of 100 .
5 UV beads www sciencekit com 9 95 for package of 240 . To share with the entire class , Paper towel, Black construction paper. UV rated sunglasses, SPF 30 sunscreen, Desk lamp with incandescent light bulb . Plastic wrap, Aluminum foil, Introduction Motivation. Many devices that we use everyday depend on the properties of light For example a. microwave oven and an x ray machine operate using different types of light. Scientists usually refer to light as an electromagnetic wave where the distance from crest to. crest of the wave called wavelength is used to differentiate the different types of light For. example radio waves have a long wavelength whereas gamma waves have a shorter. wavelength , However not all segments of the electromagnetic spectrum can be seen by the human eye In. fact the only part of the electromagnetic spectrum that humans can see is the visible. spectrum Therefore in order to get information about other segments of the electromagnetic. spectrum scientists must use devices that can specifically interact with the invisible portion of. the spectrum , IMAGE Insert Figure 1 here centered.
ADA Description This figure displays the various parts of the electromagnetic spectrum with their respective. wavelengths , Caption Figure 1 Diagram of the electromagnetic spectrum. Image file name uvlight figure1, IMAGE Insert Figure 2 here centered. Figure 2, ADA Description This figure displays the definition of wavelength as the distance between two consecutive peaks. Caption Figure 2 Diagram of a the wavelength of a wave. Image file name uvlight figure2 jpg, Source Rights Copyright 2009 Keeshan Williams Used with permission. Vocabulary Definitions, Word Definition, wavelength Distance between two consecutive peaks of a wave .
electromagnetic spectrum The range of wavelengths over which light extends . Range of light with wavelengths from 4 nanometers border of. ultra violet light x rays to 380 nanometers slightly shorter than violet in the. visible spectrum , Before the Activity, Distribute 5 beads to each student. Distribute 1 pipe cleaner to each student, With the Students. 1 Have students construct the following table in their notebooks . Did the UV beads change color Use the following, scale to describe the level of change . 1 no change in color, 2 small change in color, 3 big change in color. Condition Indoors Outdoors, a Uncovered, b Covered with sun.
If an outdoor area is not available use an open window that is exposed to direct sunlight . 2 Students will have a list of conditions depending on the number of available materials and. will answer each condition according to the provided scale . 3 For conditions that require covering the beads with a material only cover half of the beads. for a few minutes while leaving the other half exposed When removing the material . students should be very observant to any changes or lack there of that are occurring as. the beads change color easily , 4 After all conditions have been investigated all students in the class will compare their. findings Students should discuss the factors that influenced their sensor design as well as. the effectiveness of their sensor in all areas tested If possible photographs should be. taken and used to illustrate various sensor designs under the tested conditions to the entire. IMAGE Insert Image 2 here centered, ADA Description Materials needed to construct the UV bracelet. Caption Image 2 A pipe cleaner and a few UV beads are used to make an example UV sensor . Image file name UV beads and pipe cleaner image2 jpg. Source Rights Copyright 2009 Keeshan Williams Used with permission . IMAGE Insert Image 3 here centered , ADA Description A UV bracelet that is in the presence of non UV light. Caption Image 3 The neutral state of the UV beads. Image file name UV Bracelet Neutral Image3 jpg, Source Rights Copyright 2009 Keeshan Williams Used with permission . IMAGE Insert Image 4 here centered , ADA Description A UV bracelet that is in the presence of non UV light.
Caption Image 4 The UV bracelet changes color in the presence of UV light. Image file name UV Bracelet In UV Light image4 jpg. Source Rights Copyright 2009 Keeshan Williams Used with permission . Assessment, Activity Embedded Assessment, There are two criteria that the students should be evaluated on sensor design and the. effectiveness of the tested materials at blocking UV light For the sensor design a superior. design includes simple attachment to an object for example a person s wrist or a fence and. the ability to render a distinct and clear change in color under the various conditions For. effectiveness students should list the level in change of color for each material tested a. general scale can be used such as no change in color small change in color and big change. in color and determine which material is most effective at blocking UV light . Activity Extensions, Additional Multimedia Support. References, 1 The American Museum of Natural History Moveable Museum Discovering the Universe. Redirect URL, http GK12 poly edu AMPS CBRI, Keeshan Williams. Supporting Program, AMPS Program Polytechnic Institute of NYU.
Contributors, Keeshan Williams Vikram Kapila, Copyright 2009 Polytechnic Institute of NYU The development of this activity was supported. by the AMPS Project under National Science Foundation GK 12 grant 0741714 . Activity Title Making a Ultra Violet UV Light Detector Header Insert Image 1 here right justified Group Size 1 Expendable Cost per Group US 1 Grade Level 5 4 6 Time required 45 minutes Summary Students build a simple sensor for detecting ultra violet UV light Students use specialized

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