Question

Please help answering these related to each other questions. (Image attached)

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Answer 1

Apparent brightness is expressed in terms of apparent magnitude which is given by, m = -2.76 [log_10 (p) - 1] - 4.16 where P is the period. Absolute magnitude is given by, M = -3.06 [log_10 (p) - 1] - 4.87 the following table is used to show the relation to obtain the answer. As follows G < F < E < D Distance is given by the relation: d = 10^(m - m + 5)/5 so D = 11.428 parsec E = 11.917 parsec F = 14.203 parsec G = 14.948 parsec therefore In terms of increasing distance G > F > E > D \r\n Baade - Wessel ink method If a pulsating star is assumed to emit black body radiation spectrum, the measurement of the color of the surface of a star gives its temperature from the plank's law of radiation, which in turn gives luminosity and hence distance can be