What should be the tube length of a compound microscope so that it provides an…

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

Problem

What should be the tube length of a compound microscope so that it provides an approximate magnification of

300

when used with an objective of focal length

0.5\,\text{cm}

and an eyepiece of focal length

2.5\,\text{cm}

? Assume the least distance of distinct vision to be

25\,\text{cm}

and that the final image is at infinity.