AP EAMCET20226 Jul 2022Morning ShiftPhysicsRay OpticsActual
A concave lens and a convex lens are arranged as shown in the figure. The position of the final image.
Options
- A17 ~cm to the left of convex lens
- B24.2 ~cm to the right of concave lens
- C29.2 ~cm to the right of concave lens
- D24.2 ~cm to the left of convex lens
Correct answer
C. 29.2 ~cm to the right of concave lens
Step-by-step solution
For concave lens aligned & u =-30 ~cm & f =-20 ~cm aligned aligned & So, 1 v - 1 u = 1 f & 1 v - 1 -30 = 1 -20 1 v =- 1 30 - 1 20 & 1 ~V = -20-30 600 v =-12 ~cm aligned For convex lens aligned & u =-(12+5)=-17 ~cm & f =+10 ~cm aligned So, 1 v - 1 u = 1 f aligned & 1 v - 1 -17 = 1 10 1 v = 1 10 - 1 17 & 1 v = 7 170 v = 170 7 =24.2 ~m aligned So, final image will be (24.2+5) cm =29.2 ~cm to the right of concave lens.