What will be the magnification of a 4 D converging lens if the object is 1.4f away from it?

Given:
D = 1.4f
Decision :
According to the formula: Г = f / d from this it follows:
G = f / 1.4f = 1 / 1.4 = 10/14 = 5/7
The answer to this problem is 5/7



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