Polaroid Vision in a Spider Experiments show that the ground spider Drassodes cu

Question

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 850 W/m^2 shines from the sky onto the spider, and that the intensity transmitted by one of the polarizing eyes is 212 W/m^2. For this eye, what is the angle between the polarization direction of the eye and the polarization direction of the incident light? theta = 60.0 degree What is the intensity transmitted by the other polarizing eye?

Explanation / Answer

Since angle is 90 deg for first eye,

so for other eye

theta = 30 deg0

I = I0*(cos theta)^2

I = 850*cos 30 deg)^2 = 850*3/4

I = 637.5 W/m^2

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