Three polarizers are arranged as shown in the figure If the incident beam of lig

Question

Three polarizers are arranged as shown in the figure

If the incident beam of light is vertically polarized and has an intensity of 1.52W/m2 , find the transmitted intensity, when ?2 = 28.0? and ?3 = 56.0?.

If the incident beam of light is vertically polarized and has an intensity of 1.52W/m2 , find the transmitted intensity, when ?2 = 56.0? and ?3 = 28.0?.

Three polarizers are arranged as shown in the figure If the incident beam of light is vertically polarized and has an intensity of 1.52W/m2 , find the transmitted intensity, when ?2 = 28.0? and ?3 = 56.0?. If the incident beam of light is vertically polarized and has an intensity of 1.52W/m2 , find the transmitted intensity, when ?2 = 56.0? and ?3 = 28.0?.

Explanation / Answer

According to Law of Malus-

                               I=I0 cos2?            here I0=1.52W/m2

(A) If the incident beam of light is vertically polarized and has an intensity of 1.52W/m2 , find the transmitted intensity, when ?2 = 28.0? and ?3 = 56.0?.

intensity after first polarizer I1=1.52 cos228.0=1.185W/m2

intensity after second polarizer I2=1.52 cos256.0=0.475W/m2

(B) If the incident beam of light is vertically polarized and has an intensity of 1.52W/m2 , find the transmitted intensity, when ?2 = 56.0? and ?3 = 28.0?

intensity after first polarizer I1=1.52 cos256.0=0.475W/m2

intensity after second polarizer I2=1.52 cos228.0=1.185W/m2

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