Microscope A uses an objective of focal length

PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

0.25\,\text{cm}

, an eyepiece of focal length

2.5\,\text{cm}

and has a tube length

16\,\text{cm}

. Microscope B employs the same eyepiece but its tube length is only

12\,\text{cm}

. If Microscope B is to provide the same magnifying power as Microscope A, what focal length should its objective have? (a)

0.32\,\text{cm}

(b)

0.15\,\text{cm}

(c)

0.19\,\text{cm}

(d)

0.25\,\text{cm}