The value of numerical aperture of the objective lens of a microscope is 1.25

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

Problem

The value of numerical aperture of the objective lens of a microscope is 1.25. If light of wavelength

5000 \text{\AA}

is used, what is the minimum separation between two points to be seen as distinct? (1)

0.24 \mu\text{m}

(2)

0.38 \mu\text{m}

(3)

0.12 \mu\text{m}

(4)

0.48 \mu\text{m}