1Two converging lenses, the first with focal length 25 cm and the second with fo

Question

1Two converging lenses, the first with focal length 25 cm and the second with focal length 20 cm, are separated by 30 cm. A 4.0 cm tall object is placed 50 cm in front of the first lens. Where is the final image? A)20 cm after the second lens B)20 cm before the second lens C)10 cm after the second lensD) 10 cm before the second lens E)50 cm after the second lens

2)

Of the following distances, which is the closest an object can be to a converging lens of focal length f and still give a real image? 3f 2f 1.2f 0.8f 0.49f

Explanation / Answer

questions one be a

questions 2 be 3f

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