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The dark lines constituting the absorption spectrum exhibited by sunlight are frequently called: A. Fresnel lines B. Fraunhofer lines C. Fermi lines D. Franklin lines

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The dark lines constituting the absorption spectrum exhibited by sunlight  are frequently called:
A. Fresnel lines  
B. Fraunhofer lines
C. Fermi lines  
D. Franklin lines
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B. Fraunhofer lines
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