00:01
Okay, this is basically an area problem.
00:03
So i got two celloscopes.
00:05
So a has half the power of b.
00:14
Right? so if a has half the power of b, that's the same thing as saying a has half the area of b, right? the light gathering power, i should say.
00:23
So that means that b is twice the area of a.
00:32
So b is two times the area of a, right? a is half of the area of b because it has half of the power of b, the light gathering power.
00:45
Okay, so now we've got to think of, okay, how does area related to diameter, what we're talking about? so area equals pi r squared, right? and area is proportional to radius squared.
01:07
So that means area is proportional to diameter squared, right? because it's just times two.
01:11
So the area is going to also be proportional to diameter squared.
01:15
So that means if you have twice the area, you have a square factor for your diameter, right? so i'd have to take the square root of that.
01:25
So if it's two times the area, it's going to be square.
01:28
Square root of two, right? so this is two times the area...