If the object and its image are located at a distance of 5 cm from the focus of convex lens, the focal length of lens will be what?
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If the object and its image are located at a distance of 5 cm from the focus of convex lens, the focal length of lens will be what?
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Verified answer
The object distance from focus = d1 = 5 cmImage distance from focus = d2 = 5 cm.
focal length of the convex lens = f
Formula: f² = d1 * d2
so f² = 5*5 => f = 5 cm.