Complete the passage to describe one of the features of Einstein's general theory of relativity. According to Einstein, space and time are
and are parts of a whole universe that has four
dimensions. Masses in the universe space-time, and the resulting shape of space-time causes

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th