Answer to Question #138389 in Optics for dwight

Question

An object is placed 2 cm from a converging lens with a focal length of 5.4 cm. Which of the following correctly describes the image?




(a) real, inverted, reduced




(b) real, upright, enlarged




(c) virtual, inverted, enlarged




(d) virtual, upright, enlarged


(e) None are correct.

Answer 1

$\frac {1}{d_i}+\frac {1}{d_o}=\frac{1}{f}$

Therefore, $\frac{1}{d_i}=\frac{1}{5.4}-\frac{1}{2}$

$d_i=-0.31$

$Magnification= \frac{d_i}{d_o}= \frac {(-1)-0,315}{0.5}$

M=0.63. Which means the image is virtual, upright, enlarged

Answer is d