Thursday

April 24, 2014

April 24, 2014

Posted by **rabia** on Wednesday, June 4, 2008 at 8:27pm.

- science -
**drwls**, Thursday, June 5, 2008 at 12:52am(1) measure the distance required to form an image of a very distance source (like the sun)

(2) Use an optical bench and form the image of a light source. Measure both do and di and use the equation

1/do + 1/di = 1/f

These methods only work for positive lenses. If the lens is diverging, use the real image from another lens and place it on the opposite side of the diverging lens, so that it can form a real image. Then use the lens equation. f will turn out to be negative.

- science -
**drwls**, Thursday, June 5, 2008 at 12:53amIgnore my last paragraph about diverging lenses. A magnifying lens (the kind you were asked about) is never diverging.

- science -

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