Thin Lens And Lens Maker Equations Video Lessons

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Problem: A converging lens with a focal length of 50 cm and a diverging lens with a focal length of -48 cm are 223 cm apart. A 2.4-cm-tall object is 70 cm in front of the converging lens.Part ACalculate the distance between the final image and the diverging lens.Part BCalculate the image height.

FREE Expert Solution

Lens equation:
1so+1si=1f

Magnification:

m=hiho=-siso

Part A

We're given:

f1 = 50 cm

f2 = - 48 cm

ho = 2.4 cm

so = 70 cm

For the conversing lens using the lens equation:

1/50 = 1/si + 1/70

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Problem Details

A converging lens with a focal length of 50 cm and a diverging lens with a focal length of -48 cm are 223 cm apart. A 2.4-cm-tall object is 70 cm in front of the converging lens.


Part A

Calculate the distance between the final image and the diverging lens.


Part B

Calculate the image height.

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