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The Doppler effect is one of the sources of the line broadening in atomic absorption spectroscopy. Atoms moving toward the light source encounter higher-frequency radiation than atoms moving away from the source. The difference in wavelength A experienced by an atom moving at speed v (compared to one at rest) is A/ho=v/c, where c is the velocity of light. Estimate the line width (in nanometers) of the lithium line at 670.776 (6707.76 A) when the absorbing atoms are at a velocity v is: (a) 2.47 x 10³ m/s (when T= 2000 K). (b) 3.08 x 10³ m/s (when T=3120 K). (Boltzmann's constant k = 1.38 x 10-23 kg m² s² K-¹) Yo

The Doppler effect is one of the sources of the line broadening in atomic absorption spectroscopy. Atoms moving toward the light source encounter higher-frequency radiation than atoms moving away from the source. The difference in wavelength A experienced by an atom moving at speed v (compared to one at rest) is A/ho=v/c, where c is the velocity of light. Estimate the line width (in nanometers) of the lithium line at 670.776 (6707.76 A) when the absorbing atoms are at a velocity v is: (a) 2.47 x 10³ m/s (when T= 2000 K). (b) 3.08 x 10³ m/s (when T=3120 K). (Boltzmann's constant k = 1.38 x 10-23 kg m² s² K-¹) Yo

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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The Doppler effect is one of the sources of the line broadening in atomic absorption spectroscopy. Atoms moving toward the light source encounter higher-frequency radiation than atoms moving away from the source. The difference in wavelength A experienced by an atom moving at speed v (compared to one at rest) is A/ho=v/c, where c is the velocity of light. Estimate the line width (in nanometers) of the lithium line at 670.776 (6707.76 Å) when the absorbing atoms are at a velocity v is: (a) 2.47 x 10³ m/s (when T= 2000 K). (b) 3.08 x 10³ m/s (when T =3120 K). (Boltzmann's constant k = 1.38 x 10-23 kg m² s² K-¹)
Transcribed Image Text:The Doppler effect is one of the sources of the line broadening in atomic absorption spectroscopy. Atoms moving toward the light source encounter higher-frequency radiation than atoms moving away from the source. The difference in wavelength A experienced by an atom moving at speed v (compared to one at rest) is A/ho=v/c, where c is the velocity of light. Estimate the line width (in nanometers) of the lithium line at 670.776 (6707.76 Å) when the absorbing atoms are at a velocity v is: (a) 2.47 x 10³ m/s (when T= 2000 K). (b) 3.08 x 10³ m/s (when T =3120 K). (Boltzmann's constant k = 1.38 x 10-23 kg m² s² K-¹)
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