The Airy disk of a uniformly illuminated circular hole is me

The Airy disk of a uniformly illuminated circular hole is measured to be 2.00 cm on an observing screen located 2.00 m from the aperture. If the illumination wavelength is 632.8 nm, what is the hole diameter?

Solution

Given : (f)Focal length = 2 meter

() Aperture Diameter = 2 cm

(W) Wavelength = 632.8 nm

Formula for Diameter D = 2.44f #W put all the given values in the above formula & make sure convert the meter to mm, Aperture diameter to mm, wavelength to mm

Answer Hole diameter: 0.154 mm