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Introductory Physics Homework Help
Finding Distance d for Infinity Image: Diverging and Converging Lens Problem
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[QUOTE="premed_love, post: 5000616, member: 539823"] [h2]Homework Statement [/h2] An object is placed [B]12.8 cm[/B] to the left of a[B] diverging lens of focal length -6.35[/B] cm. A converging lens of [B]focal length 12.8 cm[/B] is placed a distance of d to the right of the diverging lens. [COLOR=#336600]Find the distance d that places the final image at infinity[/COLOR] [h2]Homework Equations[/h2] 1/f=1/di+1/do [h2]The Attempt at a Solution[/h2] I understand that I have a few unknowns and need to solve this a couple of times to discover the di: So [/B]1/f=1/di +1/do : MAIN EQUATION Di: 1/(-6.635)=1/di+1/(12.8cm). gives me di of -4.244 cm Do2: 4.244+25.6=29.844 cm 1/do2+1/di2=1/f2 (1/2984)+1/di2=1/12.8cm Eventually I end up with -22.41 cm. I don't know if I am supposed to solve this for 2nd time through lens. Therefore, I thought I ended up -22.41 cm. However, that is not right. Please help. [B]I have a small request: Please read the problem very carefully. I do not want to answer what kind of mirror this is if the problem already answers it. I have had to answer questions regarding variables that I clearly explained in the problem. Please refrain from it. I want to learn so if you ask me a question to help me better understand the problem than that is fine. BUT DO NOT ASK ME ABOUT WHAT THE VARIABLES ARE BECAUSE I FEEL LIKE I AM REPEATING MYSELF RATHER THAN LEARNING ANYTHING NEW. [/B] [/QUOTE]
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Introductory Physics Homework Help
Finding Distance d for Infinity Image: Diverging and Converging Lens Problem
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