Question
ly = light years
Stars P and Q have the same luminosity, but P is 30 ly from Earth and Q is 40 ly from Earth. What is the ratio of their brightness as viewed from Earth?
Stars P and Q have the same luminosity, but P is 30 ly from Earth and Q is 40 ly from Earth. What is the ratio of their brightness as viewed from Earth?
Answers
Scott
their brightness ratio is the ratio of the inverse of the square of their distances
bP / bQ = (dQ / dP)^2
bP / bQ = (dQ / dP)^2
fun times
So it would be 900:1600
= 9:16?
= 9:16?