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What causes each line of the emission spectrum?
There are two primary mechanisms that broaden spectral emission (or absorption) lines: Doppler broadening and collision-induced broadening. Doppler broadening occurs because of the relative thermal motions of the molecules in a gas. Simply put, the molecules are all bouncing off each other, so some are moving towards you and some away, some fast and some slow. Each molecule's spectrum is Doppler shifted by it's current velocity. The composite spectrum from all the individual molecules has its lines smeared out or broadened as a result. As you can guess, the amount of broadening depends on the temperature of the gas. Collision-induced broadining, sometimes called pressure broadening, is is a result of the deformation of the molecules when they bounce off each other. For example, they may not be as symmetrical after a collision as they were before. These deformations perturb the quantum mechanical energy levels of the molecule, slightly shifting the frequencies of the emission or absorption lines. Just like Doppler broadening, the composite spectrum's lines are therefore broadened. This effect depends on both the pressure and temperature of the gas. See spectralcalc for complete details and online simulations. Starlight can be reddened by the Doppler Effect and by the gravity well (that light from a star finds itself in).
How can the Doppler effect cause broadening of a spectral line?
Perhaps this broadening of the spectral line might be due to different propogation speeds under Doppler conditions when the emitting object is moving towards us? Therefore increasing the frequency shift and spreading the spectrum over a wider bandwidth. Or perhaps Take an amplitude modulated carrier wave with a fixed modulating frequency. Un-shifted the sidebands would remain constant in width. If the signal source was moving towards us the modulating frequency would also increase. The increased modulating frequency would move the sidebands further away from the carrier, increasing bandwidth or broadening the spectrum.
What is the effect of hydrogen bonding on vibrational frequencies in case of IR spectroscopy?
Hydrogen bonding results in the broadening of the stretching frequencies of functional groups like -OH, -NH, -COOH etc.
What is the definition of zone broadening in chromatography?
this is where you zone into the paper with a magnifier glass and get a beaker of water and fill it to 50ml then you hold it up in the air and tip it onto the paper but you need to be looking at the paper with a magnifier glass when doing it
Is absolute pressure static pressure?
absolute pressure
What has the author David Charles Thompson written?
David Charles Thompson has written: 'Pressure shift and broadening of alkali Rydberg states' -- subject(s): Physics Theses
How Broadening your perspective can be life enhancing?
i did this once with FORTNITE NINJA BLEVINS
What does broadening mean?
To make something wider.
Which action would most likely result in the greatest increase in the power of the executive branch?
broadening the president's wartime authority.
What would happen to a pyramid if the base keeps on broadening?
it will be broke
What is Havelock Academy's motto?
Havelock Academy's motto is 'Broadening Horizons'.
What is band broadening?
nothingbroad band connection is a jubappleit is not a band it is a jubapple
Who believe that interest groups further democracy by broadening representation within the system?
Supporters of pluralist theory believe that interest groups further democracy by allowing diverse voices and interests to be represented within the political system. They argue that interest groups help to balance power among different groups and prevent any one group from dominating decision-making.
What has the author I B Whittingham written?
I. B. Whittingham has written: 'S-matrix for broadening of helium spectral lines by helium perturbers' -- subject(s): Helium, Perturbation (Quantum dynamics), S-matrix theory, Spectra, Spectral line broadening
Supreme Court ruling have been key to broadening the scope of which expressed power?
Commerce Power
How does broadening the story to include non elite people change your understanding of the American revolution?
fdgh
What does allarg mean in music?
Allargando - slowing, but also broadening. Not just getting slower but getting grander as well.
