2.3 Low-diffraction limit We first consider the case where a

D' D 2.3 Low-diffraction limit We first consider the case where a 0m ax Show that the size of the object (a) must be larger than a certain value in order for this to happen, and give this value as a function of 1, R and D. Draw the path of the diffracted light from the object to the screen. Indicate on your figure all the places where diffraction takes place.