tcarston2043 tcarston2043
  • 12-03-2024
  • Physics
contestada

Suppose we observe a star in the big dipper spectroscopically and find an absorption line due to hydrogen in its spectrum. we measure this absorption line's wavelength to be 411 nm (nanometers). but when the same line is studied in labs, its wavelength is measured as 410 nm. how fast is it moving

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