If the angle between the pass axis of polariser and analyser is `45^(@)`, write the ratio of intensities of original light and the transmitted light after passing through analyser.

Explanation

`theta = 45^(@) :. cos theta 45^(@) = (1)/(sqrt2)`
`:' I = I_(0) cos^(2) theta " " I = (I_(0))/(2) ((1)/(sqrt2))^(2)`
`(I)/(I_(0)) = (1)/(4) rArr I : I_(0) = 1 : 4`