Two polaroids are kept crossed relative to each other

Asked by pratikbharadia | 10th Dec, 2009, 08:31: AM

Expert Answer:

Dear student

As per malus law,

the % of transmitted intensity through two polaroids is

I=Iocos^2 (theta) where theta is the angle between incident & transmitted light.

When two polaroids are crossed to each other, (theta) = 90, & transmitted intensity  I =0

When one of the polaroid turned thru 60 degees, the angle theta between the two polarising lines = 90-60 = 30, hence the transmitted intensity I'=Iocos^2 (30)

% of transmitted intensity through two polaroids = I'/Io  x100 = 75%





Answered by  | 10th Dec, 2009, 01:04: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.