Spectrophotometer

Objective
To build a spectrophotometer and use it to investigate the absorption of evident unaccented in differently colored solutions. When light hits an object, well-nigh of that light is take up by the object, and the light that is not absorbed is what we see. In this lore project, we build a simple spectrophotometer from a cell phone and use it to investigate how visible light is absorbed by differently colored solutions.
Materials:
A plot of land of wood at least 40 cm by 15 cm that fag be taken into a room that can be do very dark
system of measurement ruler or measuring tape
A small, visible-light diffraction grating; a 500 lines/mm (12,700 lines/inch) linear grating is recommended.
Transparent gluey tape
A small, white LED bulb. (5mm) Specifically
Battery, CR2032, 3V 20 mm coin.
Electrical tape
A small piece of wood or polystyrene, about 2 cm thick, or a baseplate template, mountainous enough to place the light source on heyday of.
Cups (one for each food color you want to foot race)
Water
Graduated cylinder, 10 mL, or measuring spoons
Food colors, including blue, red, and yellow
Cuvette, 3.5 mL (at least 4).




nonobligatory: Medicine dropper
Cell phone with camera
Pencil
A computer that can run Windows® software
Lab notebook
Procedure:
1. In this part of the science project, you ordain assemble the cell phone spectrophotometer. You willing read a hard, flat progress that can be apply in a dark room, and on this surface you will position your diffraction grating and light source (the LED bulb) in such a way that you can see a line of colors, or spectrum, coming through the center of the diffraction grating.
a.You will be assembling your spectrophotometer on a hard, flat surface in a room that can be made very dark. This could be a desk or dresser in the room, or a piece of wood (at least 40 centimeters [cm] by 15 cm) that can be taken into the room.
b.When you test the spectrophotometer, cover the rooms windows and any openings completely...If you want to get a honest essay, order it on our website: Ordercustompaper.com



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