*Gems* from my students
I really should have started this little collection of student quotes sooner…
From a lab on ray tracing and lenses:
Q: For a convex lens, what is the image distance when the object is very far away (i.e., at infinity)?
A: “When object is far away, the image distance is equally as close.”
Q: For a convex lens, what is the image distance when the object is very far away (i.e., at infinity)?
A: “You hold the lens from the screen the same distance as the size of the lens. ex. 20cm lens = 20cm distance”
Q: Determine the image distance and its uncertainty.
A: “Golisano building”
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Carl said,
March 8, 2008 at 2:23 am
Awesome… totally awesome.
Matt said,
March 8, 2008 at 2:37 am
Golisano building?
Joanna said,
March 9, 2008 at 5:16 pm
Oh, that was because the professor had them look out the hallway window at the building through a lens… still didn’t make it a good answer though. :-p
Bob said,
April 1, 2008 at 1:14 am
You know, I was so out of it when I took optics last year, that I do not really know what “image distances” or “convex lenses” are anymore. Oddly enough, given the way upper-level physics is, that didn’t really matter.
Makes me think of that joke, “… when you can do vector calculus in your head, but you don’t quite remember how to do long division.”
Joanna said,
April 1, 2008 at 11:38 am
Dude, I totally embarrassed myself in front my project management professor (who used to be a navy nuclear engineer) when I turned in a test and f*cked up my adding …. yes, adding.