why do spectral lines have a width and profile?
Explain why the presence of spectral lines of a given element in the solar spectrum tells you that the element is present in the Sun, but the absence of the lines would not necessarily mean the element is absent from the Sun. a. Some elements have a concentration in the Sun too low to emit or absorb light. b. The gas may be too hot or too cool, or of the wrong density, for that type of atom to have...
in atomic spectroscopy the spectral absorption and emission lines are very narrow. why are they more narrow then in molecular spectroscopy?
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...
what is meant by slit width and spectral babdpass what is meant by slit width and bandpass
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. what is meant by slit width and spectral band pass? 2. in the section on color by spectrophotometry, what type of cuvette material should be employed ? why? (quinoline yellow, phenolphthalein and methylene blue were used)
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.