Question: Now that the variable is identified, one must extract apparent magnitude (brightness) estimates for it across several epochs. That can relay if the data are

Now that the variable is identified, one must extract apparent magnitude (brightness) estimates for it across several epochs. That can relay if the data are periodic, and if the star is of the Cepheid variable star class. But first, let's refresh our memory concerning magnitudes. A magnitude difference of 5 implies a brightness ratio of ... A. 25 B. C. D. None of the answers are correct

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