The telescope at Yerkes Observatory in Wisconsin has an objective whose focal length is 19.4 m. Its eyepiece has a focal length of 10.0 cm. (a) What is the angular magnification of the telescope? (b) If the telescope is used to look at a lunar crater (diameter = 2590 m), what is the size of the first image, assuming the surface of the moon is 3.77 x 108 m from the surface of the earth? (c) How close does the crater appear to be when seen through the telescope? (a) Number i Units (b) Number i Units (c) Number i Units