JEE Main 2026 Physics question

Physics Ray Optics and Optical Instruments JEE Main 2026

An object AB is placed 15 cm on the left of a convex lens P of focal length 10 cm. Another convex lens Q is now placed 15 cm right of lens P. If the focal length of lens Q is 15 cm, the final image is .

(A)virtual, formed at 7.5 cm right of lens Q, with a size bigger than that of AB
(B)real, formed at 7.5 cm right of lens Q, with a size same as that of ABCorrect
(C)formed at infinity.
(D)real, formed at 7 cm right of lens Q, with a size smaller than that of AB

Answer: (B)

Solution

For P: u=−15, f=10 gives v=30 (30 cm right of P, i.e., 15 cm right of Q — a virtual object for Q). For Q: u=+15, f=15 gives v=7.5

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-015450