The tiny features of a computer chip are inspected with an oilimmersion microscope with an objective of focal length 1.4 mm. It is desired to resolve two objects only 480 nm apart when viewed at a distance from the objective approximative equal to its focal length. Your task is to nd the diameter of the objective needed for a microscope used with immesion oil and light of wavelength 550 nm. no\" 2 1.45 a. Determine the numerical aperture of the objective lens. This is your rst answer. b. Calculate the objective's diameter. Numerical value for the diameter is your second answer, while its unit is the third