Question
When a torch is brought 2 times closer, how many times brighter will it appear?
2
4
9
16
At first, I figured the answer would be the obvious (2), but then I second-guessed myself and figured 4
2
4
9
16
At first, I figured the answer would be the obvious (2), but then I second-guessed myself and figured 4
Answers
Anonymous
I think the answer is 4. The brightness is a function of the distance squared.