A cannon launches a

3.0

kg

3.0kg3, point, 0, start text, k, g, end text pumpkin with

110

J

110J110, start text, J, end text of kinetic energy.

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