- #1

mkematt96

- 25

- 0

## Homework Statement

2. Homework Equations

I = Imax cos^2 ((2pi/lambda)dsin(theta))

.81Imax = Imax cos^2 ((2pi/lambda)dsin(theta))[/B]

To shorten up my work I divided out the Imax

3. The Attempt at a Solution

Not sure where I am going wrong. Is the 2.65 deg not the theta I am suppose to use? I divided out the I max, square rooted both sides, took the inverse cos of the left side to cancel out the cos on the right. Then proceeded to do the algebra.