this question is from fitjee aits

given ans is D

# Doubt from polarisation

This diagram seems quite unclear to me , these type of questions are easy but here , from what i am interpret the diagram to be , option D can’t be correct .

according to me ,ans should be i/2 cos^2 theta but answer key and solution has D

Yeah , even i think the same .

Can you post the solution provided by fiitjee

And a link of video solution:

I am unable to figure out solution as they did not mention why to use sin instead of cos

@darshil_2020

If we assume polarised light to as depicted below , then we’ll get that expression.

But still, if the expression is (I sin²2Ѳ)/8 then graph B will be correct not graph D

yeah that's correct ans should be B. this question is completely mess!!according to solution is B AND in answer key ans is d

Leave about doubtnut , what was the answer and solution according to fiitjee ?

according to fitjee answer key , its D and based on their solution it's B.