Two Nicols are oriented with their principal planes making an angle of 60° . The percentage of incident unpolarized light which passes through the system is

Question

Two Nicols are oriented with their principal planes making an angle of 60° . The percentage of incident unpolarized light which passes through the system is (A) 50% (B) 100% (C) 12.5% (D) 37.5%

Tardigrade Admin · Accepted Answer

Intensity of polarized light from first polarizer =(100/2)=50 I=I0 cos 2 θ =50 cos 2 60° =(50/4)=12.5

Q. Two Nicols are oriented with their principal planes making an angle of $6 0^{\circ}$ . The percentage of incident unpolarized light which passes through the system is

50%

100%

12.5%

37.5%

Intensity of polarized light from first polarizer
$= \frac{100}{2} = 50$
$I = I_{0} cos^{2} θ$
$= 50 cos^{2} 6 0^{\circ}$
$= \frac{50}{4} = 12.5$

Q. Two Nicols are oriented with their principal planes making an angle of 60∘ . The percentage of incident unpolarized light which passes through the system is

50%

100%

12.5%

37.5%

Intensity of polarized light from first polarizer =2100​=50 I=I0​cos2θ =50cos260∘ =450​=12.5

Q. Two Nicols are oriented with their principal planes making an angle of $6 0^{\circ}$ . The percentage of incident unpolarized light which passes through the system is

Intensity of polarized light from first polarizer
$= \frac{100}{2} = 50$
$I = I_{0} cos^{2} θ$
$= 50 cos^{2} 6 0^{\circ}$
$= \frac{50}{4} = 12.5$