A 4.0-cm tall object is placed along the principal axis of a thin,convex lens of 30.0-cm focal length.If the object distance is 40.0 cm,which of the following best describes the image distance and height,respectively?
A) 17.3 cm and 7.0 cm
B) 17.3 cm and 1.3 cm
C) 120 cm and 1.3 cm
D) 120 cm and 12 cm

Question

Quizplus · Accepted Answer

Using the lens formula (1/f = 1/v - 1/u), the image distance (v) is calculated to be 120 cm. The magnification (v/u) gives the image height as 12 cm.

A 40-Cm Tall Object Is Placed Along the Principal Axis of of a Thin,convex