In the Laboratory,a Spectral Line of an Element Has a Wavelength

question 19

Multiple Choice

In the laboratory,a spectral line of an element has a wavelength of 5000 Angstroms.What would be the measured wavelength of that line in the spectrum of a planet that is approaching at a velocity of 30 km/s? (The speed of light is 300,000 km/s. )

• A)4999.5 Angstroms
• B)4995 Angstroms
• C)5000.5 Angstroms
• D)5005 Angstroms

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