A Microscope Has an Objective Lens with an Aperture of Diameter

question 19

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 1.13 × 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) 1.6 × 10−⁴ rad
• B) 0.98 × 10−⁴ rad
• C) 0.81 × 10−⁴ rad
• D) 0.49 × 10−⁴ rad
• E) ​1.13 × 10−⁴ rad

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