What focal length should a simple magnifier have so that it provides a magnifying…

PHYSICS · Subjective · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

What focal length should a simple magnifier have so that it provides a magnifying power of

8

when the eye focuses the final image at the near point? Assume

D=25\,\text{cm}