Question

a convex (converging) lens of focal length 6 centimeters as shown in the picture: 6 cm to locate the Image. Draw an arrow that represents the image. )(or redraw to the exact scale here) b. Is the Image real or virtual? Explain your choice. (2) c. Using the lens equation, compute the distance of the image from the lens. (2)

Answer 1

Here, 1/v = 1/6 - 1/18

=> v =   9 cm

=> distance of image from lens = 9 cm         (right side of the lens)

=> image formed is real .

For two convex lenses .

=> first image distance = 9 cm

=>   1/v = 1/6 - 1/3

=> v = - 6 cm

=>   final image distance = - 6 cm      (right side from lens 2)