Consider a single slit with a width of 0.0100 mm that is illuminated by light with a wavelength of 600 nm. (a) at what angle from the normal will the first minimum in the diffraction intensity occur, i. e. the minimum that is closest to the central maximum? give answer in radians to two significant figures.
(b) suppose the screen is a distance of 1 m from the double-slit. what is the distance between the central maximum in the diffraction pattern and the first place where the intensity is zero due to the single slit effect? give answer in mm to two significant figures.

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.