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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Definitions:

The Jungle

A novel by Upton Sinclair published in 1906, exposing the harsh conditions and exploited lives of immigrants in the United States meatpacking industry.

Meat Inspection Act

A United States law passed in 1906 that made it a crime to adulterate or misbrand meat and meat products being sold as food, and ensured that meat and meat products were slaughtered and processed under sanitary conditions.

ICC

The Interstate Commerce Commission, established in 1887 as the first Federal agency monitoring the operations of railroads to ensure fair rates and to regulate other aspects of their service.

Eugenicists

Advocates of eugenics, a movement aimed at improving the genetic composition of the human race through selective breeding and other methods.