i got the answer, Data, thank you...
0.
those tricky profs sometimes, I'm sure they get a kick outta kids like me stressing out about this.
thank you again!
-shawna
but what am i supposed to use for the object distance??
i don't even know where to start, really...
using: 1/p+1/q=1/f i don't know how to find any of the variables, for object distance, image distance, and then the focal length...
i guess i don't understand what you are saying, sorry.
hey- I've been working on this one for quite some time now and just can't seem to get it:
Two converging lenses with focal lengths 10 cm and 20 cm are placed 30 cm apart. Rays from a very distant object are impinged on the lens system parallel to the principal axis.
What is the refractive...