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Alain12345 said:yeah, I know that, but how do I find the uknown?
Alain12345 said:Sorry I didn't say it, but I attached a chart![]()
1/f= 1/do= 1/di
The thin lens formula is a mathematical equation used to calculate the focal length, object distance, and image distance of a thin lens. It is represented as 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance.
To use the thin lens formula, you need to have the values of two variables (focal length, object distance, or image distance) and solve for the third. You can rearrange the formula to find the unknown variable by multiplying both sides by f, do, or di.
Some common mistakes when using the thin lens formula include using the wrong sign conventions, not converting units properly, and using the wrong values for the object and image distances. It is important to double-check all values and follow the correct sign conventions for the type of lens being used (convex or concave).
A convex lens is thicker in the middle and thinner at the edges, while a concave lens is thinner in the middle and thicker at the edges. Convex lenses converge light rays, while concave lenses diverge them. The sign conventions for the thin lens formula differ depending on the type of lens being used.
Yes, the thin lens formula can be applied to lenses of any thickness as long as they are considered "thin" compared to their focal length. This means that the thickness of the lens must be much smaller than the focal length for the formula to be accurate.