The Natural Museum has been celebrating the life of Thomas Young. They develop a Young's experiment display. The museum has purchased a blue laser which emits light with a wavelength of 473nm. They also have purchased a slide with double slit, the slit spacing is 44 m. The library current plans are to project the interference pattern onto a whiteboard which is 1.0m wide and located 9.0m from the slits. Assume that each bright spot is bright enough to see.

a) What is the maximum number of bright spots which will appear on the board at these distances?

b) What is the spacing distance between each bright spots?