#### Dx

In a double slit experiment the slit seperation is 2.0mm and two wavelengths 750nm and 900nm illuminate the slits. A screen placed 2m from the slits. at what distance from the central maximum on the screen will a bright fringe from one pattern first conincide with a bright fringe from the other?

my formula?

d = sin[the] / (m [lamb]

Is my answer correct 6.0mm

Thanks!

Dx