A microscope objective has a semi-aperture angle of

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

Problem

60^{\circ}

. It is first used in air

(n=1.0)

and then with an immersion oil of refractive index

1.5

. For light of wavelength

500\,\text{nm}

, determine the minimum resolvable distance in each case.