question_answer

What are the two possible values of the magnifying powers of a simple microscope made of convex lens of focal length \[\text{f = 5}\text{.0 cm}\]                                         

Answer:

                When the final image is formed at the least distance of distinct vision, \[m=1+\frac{D}{f}=1+\frac{25}{5}=\mathbf{6}\] When the final image is formed at infinity, \[m=\frac{D}{f}=\frac{25}{5}=\mathbf{5}\]