Question

What focal-length lens would you need to place next to a converging lens of focal length 29 cm to create an effective focal length of 14 cm for the combination?

Related Questions

The microscope has a converging lens (the eyepiece) with a focal length of 2.50 mounted on one end... Optics/Lens problem. Is the image real or virtual? A converging lens of focal length f1 = +22 .5cm... A 1.00-cm-high object is placed 3.10 cm to the left of a converging lens of focal length 8.30 cm. A... An object 2.00cm high is placed 40cm to the left of a converging lens having a focal length of 30cm....