A star has a radius of three times the Sun’s radius, and an average number density of ions a factor of 1.75 higher than that of the Sun. How much time does it take on average for photons to travel across this star compared with the Sun?

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A star has a radius of three times the Sun’s radius, and an average number density
of ions a factor of 1.75 higher than that of the Sun. How much time does it take on
average for photons to travel across this star compared with the Sun?

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