Red light `I(lambda = 664 nm` in vacuum) is used in Young's experiment with the slits separated by a distance from the screen given by `D = 2.75 m.` Find the distance y on the screen between the central bright fringe and the third-order bright fringe.
Reasoning: This problem can be solved by the first using Eq. (i) to determine the value of `theta` that locates the third-order bright fringe. Then, trigonometry can be used to obatin the distance y.