You observe an object’s spectrum and you find that it has a flat spectrum in lambda: its flux density is equal to flambda=2.0E-15 erg cm-2 s-1 A-1 at all wavelengths across the visible spectrum. What is the frequency (in Hz) corresponding to wavelength 4000 Angstroms, and wavelength 8000 Angstroms? What is the flux density fnu of this object at each of those two frequencies, in units of erg cm-2 s-1 Hz-1?
You observe an object’s spectrum and you find that it has a flat spectrum in lambda: its flux density is equal to flambda=2.0E-15 erg cm-2 s-1 A-1 at all wavelengths across the visible spectrum. What is the frequency (in Hz) corresponding to wavelength 4000 Angstroms, and wavelength 8000 Angstroms? What is the flux density fnu of this object at each of those two frequencies, in units of erg cm-2 s-1 Hz-1?
Astronomy
1st Edition
ISBN:9781938168284
Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff
Chapter17: Analyzing Starlight
Section: Chapter Questions
Problem 17E: Star X has lines of ionized helium in its spectrum, and star Y has bands of titanium oxide. Which is...
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You observe an object’s spectrum and you find that it has a flat spectrum in lambda: its flux density is equal to flambda=2.0E-15 erg cm-2 s-1 A-1 at all wavelengths across the visible spectrum. What is the frequency (in Hz) corresponding to wavelength 4000 Angstroms, and wavelength 8000 Angstroms? What is the flux density fnu of this object at each of those two frequencies, in units of erg cm-2 s-1 Hz-1?
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