Question

6. The objective" and "eyepiece" of a microscope are both converging lenses and have focal lengths of 15.0 mm and 25.5 mm. A distance of 61.0 mm separates the lenses. The microscope is being used to examine an object placed at a distance of 24.1 mm in front of the objective (first lens). (a) Find the location of the final image. (b) Is the image virtual or real? Is it greater or smaller than the object? :

Answer 1

Object distance the u=-24.1 mm lens formula, 1 ui fi fi= 15m ㅗ 2401 (convexlers 2 [f 69 . Then of and lens. Mq=- a=39.72 mm obrect tor image of ist uns aet as object -(69-39.72) = 24.27 mm I [ f2 = 25.5 convern lens t lla fo -19 . 21-27 25.5 .. =-128.22 mm final image is formed at (128-22-61) = 67.22 to the left of the of the objective lens Image is [virtual as it formed left side of lens that is toward object. Total magnification mam, xm2 = -24.10 - 21-27 ./m=9.93 : image is , greater than object. 39-72 - 128-22 X