A Microscope Has an Objective Lens with an Aperture of Diameter

question 42

Multiple Choice

A microscope has an objective lens with an aperture of diameter 0.50 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 1.15 x 10^-4 rad.If the illuminating source were replaced by an violet source of wavelength 420 nm,what would the minimum angle of resolution now become? (1 nm = 10^-9 m)

• A)1.7 x 10^-4 rad
• B)1.0 x 10^-4 rad
• C)0.83 x 10^-4 rad
• D)0.50 x 10^-4 rad

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