why do spectral lines have a width and profile?
a) A photograph of an absorption spectrum is mostly bright with black spectral lines. A photograph of an emission spectrum is black with bright spectral lines. Why are they different? Explain in 4-6 sentences. b) Electron are accelerated between parallel plates in a tube containing hydrogen gas at ambient temperature. The potential difference across the plates is 12.9 V. What spectral lines will be visible in the emission spectrum? Make an energy diagram to support your answer. 380 450 590...
1) For a star that is moving away from the Earth, a) the spectral lines of the star are much narrower than the spectral lines of an identical star that is not moving towards or away from the earth. b) the spectral lines of the star are shifted towards the blue end of the spectrum compared to an identical star that is not moving towards or away from the earth. c) the spectral lines of the star are shifted towards...
Electron Transitions and Spectral Lines Conceptual Question The spectrum of a hypothetical atom is shown in the figure.(Figure 1) Three distinct spectral series are shown, with the center series corresponding to transitions to a final state of n_f = 3. The indicated spectral line corresponds to the transition from an initial state of n_i =5 to the final state n_i = 3. Which of the lettered spectral lines corresponds to the transition from n_i = 6 to n_f = 3?...
1. Explain why the spectral lines (wavelengths) associated with the energy released when the electron returns to the n = 1 level were not measured using any method. 2. Describe another method for identifying the metal ions (for the unknowns in the flame test portion) besides simply observing the colors of the flames. 3. For hydrogen, discuss what present quantum theory predicts for the position of the 1s electron?
QUESTIONS You use a diffraction grating with 3000 lines / cm to separate two spectral lines in hydrogen, with wavelengths of 485 nm and 656 nm. If the screen to observe the diffraction pattern is 15 cm from the gratine what is the distance on the screen between the first order maxima for the two spectral lines? Enter your answer in cm. Worning: The small angle approximation is not valid in this question
Two spectral lines in a spectrum have frequencies of 2.0 x 1014 Hz and 4.6 x 1014 Hz. A higher-frequency line in the same spectrum likely has a frequency of 6.6 x 1014 Hz. 13.2 x 1014 Hz. 2.6 x 1014 Hz.
14. The Zeeman effect relates to (a) Splitting of spectral lines in a strong magnetic field. (b) Splitting of spectral lines in a strong electric field. (c) Both (d) None
Define briefly the resolution of a diffraction grating. Two spectral lines in a mixture of Hydrogen (H2) and Deuterium (D2) gas have wavelengths of 656.30 nm and 656.48 nm, respectively. What is the minimum number of lines a diffraction grating must have to resolve the two wavelengths in the third order maximum?
Explain why analytical measurements would deviate from Beer's Law if the hollow cathode lamp emission were broader than the absorption profile of the absorbing species. If the true widths of the spectral lines emitted by the hollow cathode lamp are on the order of 0.02 - 0.05 Å, what causes your measured Ca line to appear so broad? my measured full width at half maximum was 0.5A.
Post-Lab Problems Part D-The Rhydberg Equation: What do the spectral lines of Hydrogen tellus? Look again at the line spectrum you for Hidrogen Sinsel drogen is such a simple element having only one electron), we can model and predict its behavior with relatively) simple equations wavelength, 1 (nm) 1 1 1 1 (final) (ninitial Where Re-2.18 10""), and in and test represent the initial and final energy levels of the electron--that is, the electron starts at the energy level and...