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 2.31 cm. An image of the slide is formed 11.6 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 starting with the first answer blank. Enter NONE in any remaining answer blanks.) 2.88439 Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. cm 9.24 Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calcu ation am out a termediate results to at least four-digit accuracy to minimize roundoff error. cm

Explanation / Answer

Given focal length f = 2.31 cm

let s------------> object distance

s'--------------> image distance

It is given s + s' = 11.6

we have 1/s + 1/s' = 1/f

1 / s + 1 / (11.6-s) = 1 / 2.31

we get object distance s = 3.1838 cm or

S = 8.4161 cm

These are the distances of lens from the slide

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