Scattered Light in the Atmosphere Is Often Partially Polarized

question 30

Multiple Choice

Scattered light in the atmosphere is often partially polarized. The best way to determine whether or not light from a particular direction in the sky shows polarization is to

• A) diffract the light through a single slit.
• B) squint while looking in that direction.
• C) rotate a piece of polaroid film about an axis parallel to the ray while looking through it in that sky direction.
• D) rotate a piece of polaroid film about an axis perpendicular to the ray while looking through it in that sky direction.
• E) reflect the rays from that direction on a shiny metal surface.

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