Question

2. The drawing shows four sheets of polarizing material, each with its transmission axis oriented differently. Light that is polarized in the vertical direction is incident from the left and has an average intensity of 20 W/m2. Determine the average intensity of the light that emerges on the right in the drawing (a) when sheet A alone is removed, (b) when sheet B alone is removed, (c) when sheet Calone is removed, and (d) when sheet D alone is removed. Vertical Horizontal Light

Answer 1

a) when sheet Aisremoved I be theintensity of the polarized beam of light incident on B the polarized beam when transmitted through filter B whichisalignedat an angle 0 = 30°, the intensity of a beam after passing thru the filter B using malus law Ig - I.cos? (30) the intensity of a beam after passing thru the filter usingmaluslaw Ic1,cos (60) thebeam passing third filer D, intensity of beam=ID In - Ic cos (30) – I_cos (30)cos(60) cos(30) = 2.81 b) when sheet Baloneisremoved I be theintensity of the polarized beam of light incident on C the polarized beam when transmitted through filter C whichisalignedat an angle = 90° the intensity of a beam after passing thru the filter usingmaluslaw Ic-I, cos? (90)-0 W c) when sheetCaloneisremoved I be theintensity of the polarized beam of light incident on B the polarized beam when transmitted through filter B whichisalignedat an angle =30°, the intensity of a beam after passing thru the filter B usingmalus law Ig-1.c0s (30) the intensity of a beam after passing thru the filter D-Ic 15 – Iycos”(90)=0 / d) when sheet Daloneisremoved I be theintensity of the polarized beam of light incident on Bafter passing through A the polarized beam when transmitted through filter B whichisalignedat an angle =30° the intensity of a beam after passing thru the filter B usingmalus law 13 - I.cos? (30) the intensity of a beam after passing thru the filter usingmalus law Ic–Igcos”(60) = 3.750 mm