what is the focal length of lence of a power -2.0d what type of lense is this and find the image
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Power = 1/central length - 2=1/f central length= - 0.5 central length is negative so this is sunken focal point.
It's anything but an estimation of the genuine length of a focal point, yet a figuring of an optical separation from the point where light beams join to shape a sharp picture of a question the computerized sensor or 35mm film at the central plane in the camera.
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