Hello i need help with this problem its in spanish it says that I=1/7 io if you

Question

Hello i need help with this problem its in spanish it says that I=1/7 io if you need anything else tell me and i can translate it, they are asking for the angle.

I translated it:

A ray of light not polarized of intensity Io hits on a polarizer whose axe of transmision is orientated vertically. The ray of light keeps traveling and hits a second polarizer whose axe of tranmision makes an angle with the orientation of the first. The intensity of the ray that comes out of the second polarizer is 1/7 Io. The angle between the axle of the polarizers is:

Un rayo de luz no polarizada de intensidad Io incide en un polarizador cuyo eje de transmision se encuentra ori nsmision hace un angulo con la orientación de primero. La intensidad del rayo de luz que emerge del segundo polarizador es 1 710 E ángulo entre los ejes de os polarizadores es entado verticalmente (ver la figura). El izador es 1/7 1o. El ángulo 6 e ayo de luz continua viajando e incide en un segundo polarizador cuyo eje de de luz ejes de los ejes de los polarizadores e

Explanation / Answer

for polarized light passing through polarizer,

I = Io (cos(theta))^2

Io / 7 = Io ( cos(theta))^2

cos(theta) = 1 / sqrt(7)

theta = 67.8 deg

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