Linearly polarized light and its field strength.

[mimibajiduh]

Homework Statement

if linearly polarized light has an electric field strength E, what is its field strength after it has passed through polarizing material that has a transmission axis oriented at an angle theta relative to the direction of E?

Homework Equations

none.

The Attempt at a Solution

i can't seem to get my head around this problem. any help would be greatly appreciated.

 

[rl.bhat]

When the transmission axis of two polarizing materials are perpendicular strength of electric field is zero. Hence electric field through second material must be Ecos(theta)