The luminosity of a Seyfert galaxy nucleus varies in a time-scale of 6 days. What could be the largest possible size of the emitting region? Select one: ○ a. 5 pc O b. 8.5x102 pc ○ c. 0.75 pc O d. 5×10-3 pc
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The luminosity of a Seyfert galaxy nucleus varies in a time-scale of 6 days. What could be the largest possible size of the emitting region?
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