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Calculate the focal length of a convex lens which produces a virtual image at a distance of 50 cm of an object is placed 20 cm in front of it? Thanks ❤ ​

Answer»

hiiiiyour answer is here !Explanation:Given, Image DISTANCE , v = - 50 cm ( Since , the image is virtual in case of a convex lens ) Object Distance , U = -20cmFocal length , f = ?By applying the formula for lenses we have,1/f = 1/v - 1/u= 1 / (-50) - 1/ (-20)= 1 / (-50 ) + 1/ 20= -2 + 5 / 100 ( By L.C.M )= 3 / 100 Therefore, f = 100/3 cm or 33.34 cm (APPROX.)follow me !



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