A star's luminosity is the ...

Question
A star's luminosity is the ...

Answer
A. apparent brightness of the star in our sky.
B. surface temperature of the star.
C. lifetime of the star.
D. total amount of light that the star will radiate over its entire lifetime.
Correct Answer: E. total amount of light that the star radiates each second. 

🧲 Slope

If the relationship between the physical parameters y and x in some physical process is described by the equation

y² = a x,

then the theoretical slope of a plot of y versus the square root of x is the square root of a.

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