Let's imagine that it was possible to photograph gas molecules on film, the velocity distribution function of which is f(v).
a. Find the velocity distribution function of "particles"—images of gas molecules on the screen, if the magnification with which the image on the film is projected on the screen is equal to l.
b. Film when playing back the recording we started scrolling k times faster than when shooting. Find the velocity distribution function of the "particles" in this case.