Hello everyone, today our professor did this hw problem for us, just different numbers. This is the question:(adsbygoogle = window.adsbygoogle || []).push({});

You produce an image of the Sun on a screen, using a thin lens whose focal length is 20.6 cm. What is the diameter of the image? (The mean radius of the Sun is 6.96x10^8 m and its mean distance from Earth is 1.50x10^11 m.)

Okay here is my work, i'm using the formula:

1/i + 1/o = 1/f

i = image distance

o = object distance;

f = focal length.

I said:

f = .206m

sove for i

http://img122.imageshack.us/img122/3278/lastscan9gt.jpg [Broken]

I submitted .95584mm as my answer but was wrong! I did it just the professor, he does make mistakes alot when trying to help us (6 students) with homework any ideas?

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# Homework Help: What is the diameter of the image? professor gave us the steps, got it wrong though!

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