Question

28. The lens combination of three lenses , and to the right of the and shown in the fig.forms an image at 30 cm L 3 lens Ls. The focal lengths of lenses , and are 10 cm and L 1 L 2 respectively. What is the focal length of lens . f 3 10 cm L 1 30 cm L 1 L 1 L g o -10 cm​

Answer 1

Answer:

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