A transparent photographic slide is placed in front of a converging lens with a

Question

A transparent photographic slide is placed in front of a converging lens with a focal length of 2.29 cm. An image of the slide is formed 11.9 cm from the slide.
(a) How far is the lens from the slide if the image is real? (Enter your answers from smallest to largest. Enter none in the first box if there is only one answer.)
cm
cm

(b) How far is the lens from the slide if the image is virtual? (Enter your answers from smallest to largest. Enter none in the first box if there is only one answer.)
cm
cm

Explanation / Answer

There are two possibilities: the image is formed in front of slide or it is formed 11.9cm behind the slide. The ocrresponding values are: 14.73cm, 9.06cm

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