Forming an Image with a Convex Lens

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A convex lens can form an image at the focal point if the object is placed at infinity. For objects that are far but not at infinity, the image will be nearly at the focal point. The relationship between the object distance, image distance, and focal length can be calculated using the lens equation: 1/f = 1/o + 1/i. This equation helps determine the precise distances involved in image formation. Understanding these principles is essential for practical applications of convex lenses.
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Using a convex lens, can an image be formed at the focal point and if so where would the object have to be from the convex lens?
 
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An object at infinity on one side of the lens will focus at the focal point on the other side.

In practice, if the object is far but not at infinity, the image will still be very close to the focal point. You can calculate this using the lens equation: 1/f = 1/o + 1/i
where
f = focal length
o = object distance
i = image distance
 

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