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- Explain why X-ray lasers would be extremely difficult to build.True or false? A. Phosphorescence occurs at higher energy then fluorescence. B. Fluorescence occurs at longer wavelengths than phosphorescence. C. Fluorescence occurs at shorter wavenumbers than phosphorescence.3.3 Electromagnetic Spectrum We can use the equation f = c/ A to relate frequency (f), speed of light (c), and wavelength (A) together. Note: c is a constant (the speed of light) and is equal to 3.00 x 10 m/s 1. Fill in the table below Visible Light Red Orange Yellow Green Blue Indigo Violet Region Radiowave Microwave Infrared (IR) Visible (VIS) Ultraviolet (UV) f=c/A c = 3.00 x 10 m/s X-ray Gamma ray Frequency (f) (s¹) Wavelength (A) (m) 650. x 10 m 5.08 x 1014 S-1 5.88 x 10¹4 s1 7.50 x 10¹4 S-¹ 570. x 10-ºm Table 1: Regions of the electromagnetic spectrum Wavelength (A) Range 3x10³ m 3x10-¹ m 475. x 10 m 445. x 10 m 3x10¹ m-1x10³ m 1x10³ m-8x10-7 m 8x107 m-4x10-7 m 4x10 m-1x10-8 m 1x10 m-1x10-10 m < 1x10-10 m Electromagnetic Spectrum: Fill in the following chart below. Use the tables on the previous pages to help! 1. Label boxes "a-g" with the correct "region". 2. Color each box in the "visible" region the correct color using colored pencils or markers. 3. Fill in a frequency (f)…
- Classify the phrases based on whether they describe fluorescence or phosphorescence. Fluorescence Phosphorescence Answer Bank T, to So longer wavelength higher energy shorter wavelength lower energy S, to Sohow do you relate structure to fluorescence? Give at least three structural characteristics of a fluorescent molecule. (Discuss the presence of functional groups, the effect of substituents and rigidity.)Elliptical cavity is used in Nd:YAG laser to provide better absorption of incident light. Explain . 2) In a coherent state all photons condense into one state . Explain.
- 3. In a fluorescence spectrum, what quantities are plotted on the x- and y-axes? In a calibration curve for a fluorescence experiment, what quantities are plotted on the x- and y-axes? 4. Explain the difference between an excitation spectrum and an emission spectrum. Why does the excitation spectrum occur at lower wavelengths than the emission spectrum? 5. What is the main difference in the spectra resulting from atomic emission and molecular emission? 6. Describe how you would use serial dilution to prepare 100 mL of a 0.50 ppm QS solution from a 10 ppm stock QS solution.9. Absorption spectra for molecules are more complex than atomic spectra because: C (a) Molecular species have side reactions C (b) Atomic species do not absorb light C (c) The number of energy states of molecules is enormous when compared with the number of energy states for isolated atoms. 10 absorption / emission of light by a molecule and describe the processes in terms of energy levels. How this information can be used for obtaining analytical information on an analyte of interest? Explain the phenomenon ofWhich of the following are true regarding phosphorescence and fluorescence? Read through all before making your one selection. A. Phosphorescence occurs at a lower frequencies than fluorescence B. Fluorescence occurs at longer wavelengths than phosphorescence. C. Fluorescence occurs at shorter wavenumbers than phosphorescence. D. B and A E. A and C F. All the above are true G. None of the above are true
- What are the following abbreviations stands for? ESI, TOF, MALDI, NMR, IR, UV-Vis.Carbon monoxide is another common poison found in the forensic laboratory. Explain how UV-visible spectrophotometry is applied to quantify carbon monoxide in blood samples.Why do we need to prepare a standard curve before we can use Beer's Law to determine the concentration of a solution? O We don't have to create a standard curve so long as we choose the appropriate wavelength. Because the standard curve tells us the absorbance of our sample Because the standard curve is used to determine the extinction coefficient Because the standard curve indicates what wavelength to set the spectrophotometer to
