A polarizing filter works by

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Study for the Praxis Physics Exam with interactive questions and detailed explanations to enhance your understanding of physics concepts. Prepare for your exam efficiently!

Multiple Choice

A polarizing filter works by

Explanation:
Polarizing filters transmit only the part of light whose electric field oscillates along the filter’s transmission axis. If the incoming light is polarized at an angle to that axis, only the aligned component passes through while the perpendicular component is absorbed or blocked. The transmitted intensity follows I_out = I_in cos^2 θ, so rotating the filter changes how much light gets through. This is about orientation of polarization, not wavelength or color, and it doesn’t strictly block all light unless the polarization is exactly perpendicular.

Polarizing filters transmit only the part of light whose electric field oscillates along the filter’s transmission axis. If the incoming light is polarized at an angle to that axis, only the aligned component passes through while the perpendicular component is absorbed or blocked. The transmitted intensity follows I_out = I_in cos^2 θ, so rotating the filter changes how much light gets through. This is about orientation of polarization, not wavelength or color, and it doesn’t strictly block all light unless the polarization is exactly perpendicular.

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