Diffraction was first investigated and described by the Jesuit astronomer, mathematician and physicist Francesco Maria Grimaldi, who was born 2 April 1618 #histsci
https://thonyc.wordpress.com/2010/03/14/refraction-refrangibility-diffraction-or-inflexion/
Refraction, refrangibility, diffraction or inflexion
Over at Skull in the Stars gg has written another one of his excellent articles on 19th century optics. This time the object of his scrutiny is the Talbot effect a consequence of diffraction that w…
Thony C