Question

an object placed 4cm in front of a converging lens produces a real image 12 cm from the lens . what is the focal length of the lens? also draw the ray diagram to show the formation of the image ​

Answer 1

Answer:

u = -4 cm

v = 12 cm

1/v - 1/u = 1/f

1/f = 1/12 - 1/-4

= 1/12 + 1/4

= 1 + 3/12

1/f = 4/12

f = 12/4

f = 3 cm

I hope this answer will help you mate!

Answer 2

Answer:

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