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| 1. |
the image of neddle plce 10cm from a lens is form on a wall 20cm on the other side of the lens.find the focal length of the lens and the image size the object size is 2.5cm |
| Answer» FOCAL length = 6.666 cm (approx)Image size = 5 cmExplanation since image is formed on other side it must be a REAL image and the lens must be Convex in nature.For further INFORMATION about the calculation see the ATTACHMENT. | |