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**1. Homework Statement**

What is the ratio of the intensity at this point to the intensity at the center of a bright bridge

**2. Homework Equations**

GIVEN:

Wavelength=6.9x10^-7m

d=0.00014m (distance between slits)

L=12m (Length to screen/point)

Y=14mm

EQUATION:

I=Io cos^2(phi/2) [(Sin (B/2))/(B/2)]

I/Io=cos^2(phi/2) [(Sin (B/2))/(B/2)]

**3. The Attempt at a Solution**

I have phi, solved for b/2 and plugged it in and did everything.

I STILL GOT IT WRONG!?!?! is my equation wrong??