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## Homework Statement

Suppose the interference pattern shown in the figure is produced by monochromatic light passing through two slits, with a separation of 127 µm, and onto a screen 1.14 m away. What is the wavelength?

## Homework Equations

wavelength = (dsin[tex]\theta[/tex]) / m

y=Ltan[tex]\theta[/tex]

## The Attempt at a Solution

[tex]\theta[/tex]= arctan (y/L) = arctan (.023 / 1.4) = .941

then plugged it into get wavelenth. i used m = 2 for 2 slits

wavelenth = 127 x 10^-6m x sin .941 / 2

i think I have m wrong?