An analyser is inclined to a polariser at an angle of 300 . The intensity of light emerging from the analyser is 1n  th of that is incident on the polarizer. Then n is equal to

Here ,  θ=300 ,I=I0n Intensity of polarized light I=I02cos2θ                                            I0n=I02cos230                                                  ⇒I02.34                                          I0n=3I08                                        ∴n=83