Light coming off a heated gas produces spectral lines when sent through a prism.

Question

Light coming off a heated gas produces spectral lines when sent through a prism. In many instances, these lines are broadened (not sharp). Which of the following is the least reasonable statement regarding such broadening: O Magnetic fields can cause broadening by perturbing (raising and lowering) molecular or atomic energy levels. O Stellar rotation produces broadening because one side of the star is moving toward us and the other away from us. Increasing the density of a gas can cause broadening because the intermolecular interaction perturbs (sometimes lowers, sometimes raises) energy levels. O Heating a gas causes broadening because heated gas molecules move faster in all directions, with the spectra of some molecules being blue-shifted while the spectra of others being red- shifted O The spectrum of a distant galaxy is broadened as a result of its recessional movement.

Explanation / Answer

1)increase the density of gas can cause broadning because the intermolecular interaction perturbs energy level

2) occured less than 100 million years ago (65 million years approx) and released an energy , firestorm and changing the global condition and became an extinct to dinosaurse and these can be equal to today world nuclear arsenel

3) 12 thousand years ( 17110 years is the correct age of the tool )

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