In: Physics
A 1.8-cm-tall object is 3.1 cm to the left of a diverging lens with a focal length of -3.1 cm. A converging lens with a focal length of 4.6 cm is distance d to the right of the first lens. a) For what value of d is the image at infinity? b) What is the angular size of the image as seen by looking through the converging lens? ?c) What is the angular magnification of this two-lens magnifier?
Using lense formula
So image distance for the first lens is -1.55 cm
Object distance for conversing lens will be
using lens formula
So the distance between two lens is 3.05 cm
------------------ Solution for part (b) ----------------------------------
Magnification by first lens is
cm
angular magnification of conversing lence is
So angular size of the image seen by looking through the converging lens is 4.9 cm
--------------------- Solution of Part c ----------------------------------
Angular magnification of this two-lens magnifier is
So angular magnification of the two lens magnifier is 2.72