The best estimate of a right angle can be determined using the Rayleigh criterion. For a 3.00-mm diameter pupil, the angle between two just-resolvable points of light is approximately 0.407 degrees.
The best estimate of a right angle can be determined using the Rayleigh criterion, which gives the smallest possible angle between point sources or the best obtainable resolution. The Rayleigh criterion is given by the equation 0 = 1.22/D, where D is the diameter of the pupil. So, to find the angle for a 3.00-mm diameter pupil, we can use the average wavelength of light, which is 550 nm.
Using the equation 0 = 1.22/D, we have 0 = 1.22/3.00 = 0.407. To find the angle, we can convert this to degrees by multiplying by 180 and dividing by pi. So, the angle between two just-resolvable points of light for a 3.00-mm diameter pupil is approximately 0.407 degrees.