1. The problem statement, all variables and given/known data Two small light bulbs are placed close together to try and create an interference pattern. This pattern would not be visible due to the: a. random phase differences between the light waves from the two sources b. very high speed of the light waves c. diffraction of the light through the air molecules surrounding the bulbs d. very short wavelengths of the light waves e. inability of the human eyes to resolve two sources close together 2. Relevant equations 3. The attempt at a solution I think the correct answer is A. But, D also sounds correct but I am not sure what is the best answer. I know that light has short wavelength but then two light sources also have random phase differences. Please help.