Question

Refer to the equation derived in example 5 (\[I=I _{0}\cos ^{2}\]). What angle should the axes of two polarizing lenses make in order to block all light from passing through?

Answer 1

"the equation derived in example 5".

Answer 2

That is this:
\[I=I _{0}\cos ^{2}\]

Answer 3

yeah, theta, sorry I can't get it to show up

Answer 4

Is I intensity?

Answer 5

My book doesn't say, but I would assume so

Answer 6

Honestly, I need more information to just say what it is, but it looks like you can just set cos^2(theta) = 0.