What Is the Primary Visible Color of an Emission Nebula

question 15

Multiple Choice

What is the primary visible color of an emission nebula?

• A)black, because of dust
• B)blue from the scattering of light off the tiny molecules
• C)blue due to ionized helium atoms
• D)red due to ionized hydrogen atoms
• E)red because of reddening by dust

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Definitions:

Predictive

Relating to the ability to make predictions about future events based on current or past data.

Established Measures

Metrics or standards that have been widely adopted and accepted for evaluating performance, quality, or attainment.

Split Half

A reliability measure where a test is divided into two parts and the scores for each are correlated with one another to assess consistency.

Validity Measures

The extent to which a test or tool measures what it is intended to measure accurately.