isabellao7989 isabellao7989
  • 22-11-2019
  • Physics
contestada

At what angle should the axes of two polaroids be placed so as to reduce the intensity of the incident unpolarized light to 13.

Respuesta :

Manetho
Manetho Manetho
  • 22-11-2019

Answer:

θ = 66.90°

Explanation:

we know that

[tex]I= \frac{I_0}{2}cos^2\theta[/tex]

I= intensity of polarized light =1

I_o= intensity of unpolarized light = 13

putting vales we get

[tex]1= \frac{13}{2}cos^2\theta[/tex]

⇒[tex]\theta=cos^{-1} \sqrt{\frac{1}{6.5} }[/tex]

therefore θ = 66.90°

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