Cuesta College, San Luis Obispo, CA

Placing an object __________ to the left of a converging lens would produce a real image with the greatest magnification.

(A) out at ∞.

(B) just outside the focal length.

(C) just inside the focal length.

(D) almost next to the lens.

Correct answer: (B)

In order to produce a real image from a converging lens, an object should be placed at a distance anywhere from +

*f*<

*p*< +∞. As linear magnification

*m*= -

*q*/

*p*=

*f*/(

*f*-

*p*), the greatest magnified real image will result in the limit where

*p*->

*f*.

Response (C) would result in a virtual image with the greatest magnification.

Section 30882

Exam code: quiz02gL4s

(A) : 1 student

(B) : 18 students

(C) : 5 students

(D) : 0 students

Success level: 75%

Discrimination index (Aubrecht & Aubrecht, 1983): 0.47