1. Why does the green dye have two peaks in its spectrum? A two-component mixtur
ID: 983602 • Letter: 1
Question
1. Why does the green dye have two peaks in its spectrum? A two-component mixture is made up of Components A and B. The absorption spectrum for the mixture is given in the box below and the peaks for each component are labeled. Which of the following spectra (1-3) for Component A represents the best resolution (separation) of the two-component mixture? Explain: 2. Absorption Spectrum of a Two-Component Mixture 400 450 500 550 600 650 700 Wavelength (nm) Absorption Spectrum of Component A Absorption Spectrum of Component A Absorption Spectrum Absorbance Absorbance 400 450 500 550 600 650 700 Wavelength (om 400 450 S00 550 600 650 700 Wavelength (nm 400 450 500 550 600 650 700 Wavelength InmExplanation / Answer
1.
Light that is visible to the typical human eye is comprised of wavelengths between about 380 and 750 nm. When white light (all visible wavelengths) strikes an object, the object may reflect, absorb, or transmit the light. If only certain wavelengths are absorbed by the object, the transmitted light will appear as the complementary color to the light that was absorbed.
As we know, a green dye results from mixing blue and yellow dyes. Nevertheless, those are the reflected colors; actually green dyes absorbs light around 440 nm (violet-blueish) and 660 nm (red). Both violet and red are the complimentary colours of yellow and blue, respectively.
2. Choose (1), because the other ones are absorbing in the wavelenght of Compund B (610 nm aprox).
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