The luminosity of the red giant is 108 times that of the red dwarf. How many times is the giant’s radius larger than the dwarf’s radius?

decision
Lg / Lr = 4nR (g) ^ 2 * o * T ^ 4 / 4n R (r) ^ 2 * 0 * T ^ 4 since the temperature is the same, the expression will be simplified

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