Question

An object is placed 14.3 cm to the left of a diverging lens with a focal length of -12.0 cm. A second lens (with a focal length of 26.5 cm) is located 16 8 cm to the right of the first lens, Find the object distance for the second lens Find the location of the final image (measured from the second lens).

Physics lens problem. please help and show work please thank you!

Answer 1

apply lens formula for diverging lens

1/f = 1/v - 1/u

- 1/12 = 1/v + 1/ 14.3

v = 6.525 cm

now the above image acts as object for lens 2

object distance of which is given by

u' = 16.8 + 6.525 = 23.325 cm

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b)

using lens formula for otger lens

1/26.5 = 1/ v' + 1/23.235

v' = 188.584 cm to the left of other (converging) lens

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