Understanding the Thin Lens Equation: How to Graph and Interpret Results

[Larrytsai]

I need to learn how to graph do=1/(f -1/di) like i have my measurements and when i plug in my di i get a do so what do i do with my old do?

 

[quantumdude]

do=1/(f -1/di)

Are you sure that's the correct equation? Shouldn't it be the following?

$$d_o=\frac{fd_i}{d_i-f}$$

 

[Larrytsai]

Are you sure that's the correct equation? Shouldn't it be the following?

$$d_o=\frac{fd_i}{d_i-f}$$

umm that's the way my teacher wrote it. Iduno he might be wrong lol

 

[quantumdude]

I don't think you typed it in correctly. In the denominator you have f-1/di. You're subtracting a distance and an inverse distance. The units don't work out. Please check it. Also, when you say you need to graph the equation, do you know the values of any of the variables do, di, or f? If not, then you'll have to do a 3D graph, which is much more involved.