A Microscope Has an Objective Lens with an Aperture of Diameter

question 70

Multiple Choice

A microscope has an objective lens with an aperture of diameter 0.60 cm where a monochromatic light source of wavelength 580 nm is used to illuminate the object. It is determined that the minimum angle of resolution is 1.18 *10 ^{- 4} rad. If the illuminating source were replaced by a source of wavelength 700 nm, what would the minimum angle of resolution now become? (1 nm = 10^-9 m)

• A) 0.58*10^-4 rad
• B) 1.4 *10^-4 rad
• C) 0.85 *10^-4 rad
• D) 1.2 *10^-4 rad

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