This is a big one for social workers, because many of us work in crisis situations. Employers want to make sure you can handle stressful situations and take the time for self-care. They donât want to hire someone who will burn out quickly.
This is what makes the image look smaller. The biggest refracting telescope in the world is located at the Yerkes Observatory of the University of Chicago at Williams Bay, Wisconsin. It has an objective lens thats 1.02 meters (40 inches) across, and its total power is 195x. Reflecting telescopes, on the other hand, dont use lenses at all.
The large mirror may need collimation occasionally so that sharp focusing is possible. On a cold night this mirror may fog up when the telescope is taken outside. Thirty min- utes or more may be needed before a reflector can be used. Other than maintenance the large difference is obvious. Refractors are like spectacles, in fact that was their origin.