Question

We have two converging lenses, each with a focal length of 12cm and separated by a distance of 24cm. An object (25cm tall) is placed 36cm to the left of the lens on the left.

Part A: Determine the distance from the lens on the left to the image it produces.

18cm

Part B: Determine the height of the image produced by the left lens.

-12.5

That image now serves as the object for the lens on the right.

Part C: Use your result from Part A to determine the object distance for the lens on the right.

Part D: What is the image distance di for the final image produced by the right lens?

Part E: What is the height of the final image produced by the right lens?

Part F: Is the final image from the right lens upright or inverted?

Part G: Is the final image from the right lens real or virtual?

Answer 1

Here the key is to solve the problem step by step , i have used the lens formula to calculate the image and object distances and then used magnification formula to find out the heights

Here one more thing to keep in mind is the sign convention