How do you define the principal focus of a diverging lens? A. The place where incident rays parallel to the principal axis converge after they are refracted

B. The place where incident rays appear to have emanated from

C. The place where refracted rays parallel to the principal axis converge after they are refracted

D. The place where refracted rays appear to have emanated from

The average atmospheric pressure on earth is approximated as a function of altitude by the relation patm = 101.325 (1 − 0.02256z)5.256, where patm is the atmospheric pressure in kpa, and z is the altitude in km with z = 0 at sea level. determine the approximate atmospheric pressures at atlanta (z = 306 m), denver (z = 1610 m), mexico city (z = 2309 m), and the top of mount everest (z = 8848 m).