Acircular space station has a diameter of 1,700 meter. the station rotates to simulate artificial gravity on the inside. what must the period be of the space station in order to simulate earths gravity?

When you see distant streetlights through smog, they look dimmer and redder than they do normally. but when you see the same streetlights through fog or falling snow, they look dimmer but not redder. use your knowledge of the interstellar medium to discuss the relative sizes of the particles in smog, fog, and snowstorms compared to the wavelength of light.