"30. How far is the image from the lens if an object is placed 60 mm away from a diverging lens with focal length -40 cm?"

How can I draw a ray diagram for this without the height of the object?

3/20/2007 5:24:23 PM

i wonder if muth is teaching 492k optics this semester

3/20/2007 6:06:02 PM

I wonder if anyone will help me

3/20/2007 6:19:54 PM

google will help you

http://physics.bu.edu/py106/notes/Lenses.html

1/d[o] + 1/d[i] = 1/f

1/60 + 1/d[i] = 1/-40

3/20/2007 6:28:21 PM

i love high school physics

3/20/2007 6:34:01 PM

so I get -20?

hmmm but it tells me the answer is 24

nm, worked it out

[Edited on March 20, 2007 at 7:55 PM. Reason : I suck at Maths]

I would still like to see how to work it out like a ray diagram
I'll probably have more luck figuring that out on the test

[Edited on March 20, 2007 at 7:56 PM. Reason : -]

3/20/2007 7:43:36 PM

that link has ray diagrams

3/20/2007 8:26:24 PM