Forms of Radiation That Are Not Visible

question 7

Multiple Choice

Forms of radiation that are not visible

• A) are,by definition,not part of scientific theories because they cannot be seen.
• B) have been detected only since the 1970s.
• C) probably hold great promise for the future,but we have not been able to make any scientific use of them with present technologies.
• D) have allowed us to determine much of what we now know about the universe.

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Definitions:

Independent Variables

Variables in an experiment or model that are manipulated or categorized to determine their effect on dependent variables.

Main Effects

The direct impact of independent variables on dependent variables in factorial research, not accounting for interactions between variables.

Interaction Effects

In statistical models, the combined effect of two or more independent variables on a dependent variable that is different from their individual effects.