A converging lens of focal length 19.2 cm is separated by 48.3 cm from a converg

Question

A converging lens of focal length 19.2 cm is separated by 48.3 cm from a converging lens of the focal length 4.74 cm. Find the position of the final image with respect to the second lens of an object placed 39.4 cm in front the first lens. Answer in units of cm. A converging lens of focal length 19.2 cm is separated by 48.3 cm from a converging lens of the focal length 4.74 cm. Find the position of the final image with respect to the second lens of an object placed 39.4 cm in front the first lens. Answer in units of cm.

Explanation / Answer

Image distance of the object due to first lens is :                   1/ f1   =   1/ u + 1/ v or               1/ v    = 1/ f1   - 1/u                                = 1/ 19.2 - 1/ 39.4                 v       = 37.45   cm Image generated from first lens going to be object for thesecond lens. Hence Object distance for the second lens is:   u1 =   48.3   cm - 37.45 cm                                                                               =   10.85   cm       1/ f2  = 1/ u1 + 1/ v1       or   1/ v1 = 1/ f1 - 1/ u1                       = 1/ 4.75   - 1/ 10.85      or      v1   = 8.45   cm Hence the position of the final image with respect to thesecond lens   is v1    = 8.45   cm Hope this helps u!

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.