absorbs or reflects some light, some still passes through– translucent.With the clear plastic wrap, little if any light shines on the student’s face who is holding the wrap and the floor is lit up under the wrap as virtually all of the light shines through the clear plastic onto the floor below. With the wax paper, some light shines on the first student’s face, and some shines on the floor below the paper. With aluminum foil, all the light is reflected into the student’s face, ‘none’ is absorbed, and none passes through and shows on the floor below. The black paper absorbs virtually all of the light.įor the white paper, the second student’s face has a lot of light shining on it as most of the light is reflected, some is absorbed, but little goes through the paper to the floor below. (Example for scoring 1–no light, 2–a little light, 3–lots of light, 4–as much light as the flashlight gives off.)įor the black paper, the judges will see little or no light shining on the second student’s face or on the floor. The fourth student looks at the floor below the paper, judges and scores the amount of light they see.The third student looks at the face of the student holding the paper, judges and assigns a score to the amount of light they see shining on the second student’s face.A second student sits in a chair and holds the piece of paper/wrap in front of them, angled toward their face (as if they were ‘reading’ the paper).Have one student hold the flashlight and shine it downwards onto the piece of paper held by the second student.Make the classroom as dark as possible.This experiment helps children understand these differences and become familiar with the properties of opacity, translucency, and transparency. Materials often behave differently when placed in a beam of light. Students should not be directly shining the light into any eyes. Remind students of expectations when in a darkened room. This is a research activity using various primary and secondary reference sources. Light and sound are forms of energy with specific properties.Visit for information on HP Plotter Pens.…an absorbing and reflective investigation into the properties of materials Note: translucent/vellum paper above supports many discontinued models of HP pen plotters such as those listed here: translucent/vellum paper above is a viable monochrome plotter paper on inkjet plotters such as the HP DesignJet 100, 120, 430, and 1050c printers. It is designed to replace pen plotter vellum from Hewlett Packard which was discontinued after modern color inkjet plotters were first introduced and became widespread. This translucent/vellum paper is compatible with monochrome inkjet plotting applications and all traditional pen plotters. 50 yard rolls are also available in 24 and 36 inch widths. vellum paper ("vellum") is appropriate for monochrome DesignJet applications on printers such as the HP DesignJet 100, 120, 430, and 1050c printers. It is designed to replace the vellum paper for pen plotters from Hewlett Packard which was discontinued after today's inkjet plotters were introduced and became widespread. Graytex vellum is designed for black-and-white or monochrome plotting applications. Roll sizes available include 24- and 36-inch wide rolls. vellum paper is available in the following engineering and architectural sizes shown below. weight adds the benefit of durability against frequent handling.ġ7 lb. Vellum is 100% rag (cotton) content which is a higher caliber paper than pulpwood or groundwood content, making for a longer lasting sheet.
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