When an object is located 40 cm to the left of a lens with a focal length f an image is produced at a distance of L away from the lens. The lens is replaced with another lens having a focal length of 3f the image is now located at a distance of 2L from the lens.

(a) What is the distance L? Hint: Write out an equation for each case and try combining them. 

(b) What is the focal length f?

(c) What type of images are being created (virtual or real)?

Answer rating: 100% (QA)

a The distance L10 in the 1st case the equation is 1401L1f in the second ... View the full answer