What is the intensity transmitted by the other polarizing eye? For this eye, wha

Question

What is the intensity transmitted by the other polarizing eye? For this eye, what is the angle between the polarization direction of the eye and the polarization direction of the incident light? Polaroid Vision in a Spider Experiments show that the ground spider Drassodes cupreus uses one of its several pairs of eyes as a polarization detector. In fact, the two eyes in this pair have polarization directions that are at right angles to one another. Suppose linearly polarized light with an intensity of 900 W/m^2 shines from the sky onto the spider and that the intensity transmitted by one of the polarizing eyes is 252 W/m^2 .

Explanation / Answer

The fraction of light transmitted is equal to  cos2 so:

cos2    = 252 / 900 = 0.529

cos = 0.529 = = 58.06 = 58.1 degrees

I = Io*cos2(90- )

I = 900*cos2(90- )

I = 648.7

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