The 1964 Experiment That Checked the Validity of the Principle

question 25

Multiple Choice

The 1964 experiment that checked the validity of the principle of the constancy of lightspeed involved

• A) a NASA satellite that emitted radiation both forward and backward.
• B) comparison of the speeds of two parallel light beams, one emitted on Earth and other emitted from a jet airplane.
• C) the emission of light from two atoms that were at rest on Earth.
• D) jet planes carrying a highly accurate atomic clock, and a similar clock on Earth.
• E) a fast- moving sub- atomic particle that emitted radiation both forward and backward.

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Definitions:

Yaqui

An indigenous group native to the valley of the Yaqui River in Mexico.

Pesticide Use

The application of chemicals to crops, buildings, and other areas to control pests and disease.

Ethnographers

Researchers who study cultures and communities by participating in and observing their daily lives, often living among the people they are studying.

Key Consultants

Members of the society being studied who provide information that helps the researchers understand the meaning of what they observe. Early anthropologists referred to such individuals as informants.