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- Can a case 1 image be larger than the object even though its magnification is always negative? Explain.Project 2: Food Dye Spectroscopy Which scale (percent transmittance or absorbance) is most useful for collecting data from the spectrometer? Why?Bigger size sample would result to better quality spectra compared to smaller sample with small size in ATR-FITR. True False
- whar do these ir peaks mean IR 2359.48 1697.05 1610.27state if true or false 1. Prior to a fixed point or wavelength reading, spectral scanning can be done to determine the maximum absorbance wavelength of a sample. 2. The purpose of a diffraction grating is the same as that of a prism. 3. In any UV-VIS spectrophotometer, the light is filtered first to a single wavelength or narrow range before it hits the sample 4. In any UV-VIS spectrophotometer setup, the detector always comes right after the sample container. 5. It is necessary to set the blank before each reading even if the only difference between the sample solutions is the amount of analyte. 6. Prior to a fixed point/wavelength reading, spectral scanning can be done to determine the maximum absorbance wavelength of a sample.Convert the following transmittance data to absorbance. a) 27.2% b) 0.579% c) 30.6%
- _________IR spectrum is normally utilized by analytical laboratories. Transmittance Absorbance None of the choices are correctA)What absorbance value corresponds to 80% transmittance? B)What is the new % transmittance value if the absorbance value in A increases by 0.250?Which of the the following is false regarding spectrophotometry? A. The concentration of a sample increaes with the path length of the curvette or sample holder since the absorbance increases B. When absorbance increases, transmittance decreases C. The absorption coefficient depends on wavelength of light and type of sample D. Materials with higher absorption coefficients more readily absorb light. E. The lambda max of a red sample is at a shorter wavelength than the lambda max of a blue sample
- Which of the the following is false regarding spectrophotometry? A. The concentration of a sample increases with path length of the curvette or sample holder since the absorbance increases B. when absorbance increases, transmittance decreases C.The absorbance coefficient depend on wavelength of light and type of sample.When do you need to blank a spectrophotometer (Spec 20)? a.After the wavelength is changed. b.After completing all data collection. c.Before running a set of samples. d.Between each sample, even if the wavelength remains the same.#28 the base peak in a mass spectrum is the peak corresponding to the maximum mass. True or False