The WHITE numbers painted on the left side of the table will inform us of... A. the number of valence electrons
B. the number of energy levels around the nucleus
C. the number of protons in the nucleus
D. the number of neutrons in the nucleus

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90