12/13/2023 0 Comments Visible light spectrum![]() ![]() Virtual option if you do not have a spectrometer Record each new color with both initial and final wavelengths observed for each color. Continue increasing the wavelength on the spectrophotometer.When you notice a color change, record the new color and the first wavelength of which you observe this new color.Record the last wavelength that you are able to still observe the first color. Continue increasing the wavelength and watching the color displayed on the paper strip in the sample compartment.Record your observation in the chart under the Results section. Beginning with the wavelength of 325 nm, increase the wavelength until you can first see a color. Place a thin strip of white paper in the sample compartment of the spectrophotometer.Press 0 ABS/100%T to set the blank to 0 Absorbance.(This is the lowest wavelength available for the Genesys 20 spectrophotometer.) Set the spectrophotometer to a wavelength of 325 nm.Allow the instrument to warm up for 30 minutes before using it. The power-up sequence will take about 2 minutes to complete. Check that the sample compartment is empty before turning on the spectrophotometer.Google Sheet: Data Analysis: Measuring Visible Light ( Teachers: Make a copy of this template to share with students for entering their data.)Ĭlick the thumbnail for video instructions.Students will compare observations to develop wavelength ranges for different colors.Students will measure wavelengths that correspond with different colors.Students will investigate the visible light band of the electromagnetic spectrum.Students will use a spectrophotometer to learn about the wavelengths that correspond with visible light. ( 2) This range of wavelengths includes visible light, which is the form of electromagnetic radiation that our eyes can detect. A spectrophotometer is an instrument that performs measurements within the wavelength range of 325 to 1100 nanometers. ( 1) Different types of electromagnetic radiation such as radio waves, microwaves, visible light, and x-rays are associated with specific wavelengths. The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. Measuring Visible Light How can we measure visible light? ![]()
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