A Microscope Has an Objective Lens with an Aperture Diameter

Multiple Choice

A microscope has an objective lens with an aperture diameter 0.70 cm.A monochromatic light source of wavelength 580 nm is used to illuminate the object.It is determined that the minimum angle of resolution is 1.13 x 10^-4 rad.If the present lens were replaced by one with an aperture of diameter 0.90 cm,what would the minimum angle of resolution now become? (1 nm = 10^-9 m)

A) 2.6 x 10^-4 rad
B) 3.6 x 10^-4 rad
C) 1.8 x 10^-4 rad
D) 1.5 x 10^-4 rad