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November 20, 2014

November 20, 2014

Posted by **Anonymous** on Tuesday, March 27, 2012 at 5:08pm.

- physics -
**Elena**, Wednesday, March 28, 2012 at 12:50pmThin Lens Equation

1/d +1/f = 1/F,

where d is the object distance,

f is the image distance

F is the focal length

A is the size of the object

B is the size of the image.

B = 0.55•A,

From the similarity of triangles

d/A = f/B

d = (A/B) •f = f/0.55

F = d•f/(d+f) =f/1.55=0.3/1.55 = 0.194 m

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