a converging lens has a focal length of 13.0 cm for each off two locatednto the

Question

a converging lens has a focal length of 13.0 cm for each off two locatednto the left of the lens one at a distance of 20.5cm and the other at a distance of 8.00 cm Problem 24.49 Part A A converging lens has a focal length of 13.0 cim For each of two objocts located to the left of the lens, one at a 8 00 cu, determine the image position. Enter your nu with a cm Submit Part B the magnification Enter your answer as two numbers separated with a comma. Submit Part C whether the image is real or virtual.

Explanation / Answer

a)

here by using the lens formula

1 / f = 1 / v - 1 / u

v = 1 / ( 1 / f + 1 / u)

v = 1 / ( 1 / 13 - 1 / 20.5 )

v = 35.53 cm

then for the other object

v = 1 / ( 1 / f + 1 / u )

v = 1 / ( 1 / 13 - 1 / 8)

v = -20.8 cm

b)

for magnification

m = - v / u

m = - 35.53 / -20.5 = 1.73

and for another object is

m = 20.8 / -8 = -2.6

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