What is the luminosity of this star?

Question

A star observed has a brightness of 0 W·m^-2 and has a distance determined to be 6.41×10¹⁷ m (16.60 parsecs). Use the equation: B=L/4(pi)d² to solve this problem.

Thank you!!

Answer 1

In order to solve for Luminosity (L), we must figure out what we know from our equation first:

Brightness (B) = 0 Wm²

Distance (d) = 6.41 x 10¹⁷ m

Pi = 3.14

1) Solve for L

B=L/4(pi)d²

B*4(pi)(d²)=L

2) Plug in what we know into the equation given

0*4(3.14)(6.41x10¹⁷)²=L

L=0