Passage VI

A star's brightness is described by its magnitude. As magnitude increases, brightness decreases. A star's apparent magnitude is measured from Earth. A star's absolute magnitude is the magnitude that would be measured 10 parsecs from the star (1 parsec [pc] = 3.1 x 1016 m). V represents the apparent magnitude of a star's visible light. MV and MB represent the absolute magnitudes of a star's visible light and blue light, respectively.

Table 1 lists V, MV, V - MV, and MB - MV for particular stars in each of 4 hypothetical star clusters (SCs). Figure 1 shows SC age versus MB - MV. Figure 2 shows SC distance from Earth versus V- MV. Table 2 lists a star's power output of visible light for a given MV.

32. Based on Tables 1 and 2, the power output of visible light is greatest from the particular stars in which of the 4 star clusters?

Answer and Explanation

Your Answer is

Correct Answer is G

Explanation

It can be seen from table 2 that the smaller the MV, the larger the output. So corresponding to table 1, it can be seen that the MV of SC II is the smallest