Electromagnetic Radiation Moving Through Space with the Speed of Light

question 240

Multiple Choice

Electromagnetic radiation moving through space with the speed of light consists of oscillating:

• A) electric and magnetic fields moving in opposite directions along the same line in space.
• B) magnetic fields that, over time and distance, change to oscillating electric fields and then back to magnetic fields in a continuous manner.
• C) electric and magnetic fields, always inseparable, always having the same frequency and wavelength and traveling in the same direction.
• D) electric fields, with magnetic fields occasionally accompanying them, moving in the same direction.

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Definitions:

Punctuated Equilibria

A model of macroevolutionary change that suggests evolution occurs via long periods of stability or stasis punctuated by periods of rapid change.

Darwinian Gradualism

The theory proposed by Charles Darwin that evolution occurs through the gradual accumulation of small genetic changes over time.

Fossil Record

The total number of fossils discovered and the information they provide about past life forms and the environments they lived in.

Mousterian Tools

A set of stone tool types associated with Neanderthals and early modern humans, characterized by their flake-based technology.