The Doppler Shift Method for Calculating Recession Speed

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SUMMARY

The discussion focuses on applying the Doppler Shift Method to calculate the recession speed of celestial objects. Participants suggest using the formula \(\frac{v}{c} = \frac{Δλ}{λ}\) to determine the Doppler shift, specifically calculating the shift across the visible spectrum from 3900 angstroms to 6600 angstroms. The recommended approach involves using the UV wavelength of 3900 angstroms as a reference point for accurate speed estimation. This method effectively combines theoretical understanding with practical application in astrophysics.

PREREQUISITES
  • Understanding of the Doppler Effect in astrophysics
  • Familiarity with wavelength measurements in angstroms
  • Basic knowledge of the speed of light (c)
  • Ability to manipulate algebraic formulas
NEXT STEPS
  • Research the Doppler Shift formula in detail
  • Explore the concept of redshift and blueshift in astronomy
  • Learn about the significance of wavelength in astrophysical observations
  • Investigate the relationship between recession speed and distance in cosmology
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Astronomy students, astrophysicists, and educators looking to deepen their understanding of celestial mechanics and the application of the Doppler Shift Method in calculating recession speeds.

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Homework Statement

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The Attempt at a Solution



Now the question did not say what the wavelength was which is annoying.
BUT would this be a good way to work it out?

[itex]\frac {v}{c} = \frac{Δλ}{λ}[/itex]
 

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i think u r right somewhat. calculate the doppler shift of the wavelength as the entire range of visible region, i.e, 6600 angstorm minus 3900 angstorm. use the doppler shift of wavelength'' formula and get the actual speed of receeding. the actual wave length would be of UV (3900 angstorm). try this and tally the ans.
 

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