In Comparing the Fraunhofer Lines with Light Emitted by Elements

question 93

Multiple Choice

In comparing the Fraunhofer lines with light emitted by elements in a flame, Bunsen and Kirchhoff demonstrated that _______.

• A)atoms emit and absorb electromagnetic radiation at characteristic wavelengths.
• B)the solar spectrum is continuous.
• C)alkali metals absorb and emit the same wavelengths.
• D)nuclear reactions are responsible for the absorption and emission of electromagnetic radiation.
• E)the sun's composition is changing over time.

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Definitions:

Null Hypothesis

The null hypothesis is a statement used in statistical testing that proposes there is no significant difference or effect, serving as the default assumption to be tested against.

Level of Significance

The threshold below which a p-value is considered statistically significant, typically set at 0.05 or 5%, indicating the probability of rejecting the null hypothesis when it is true.

Point Estimate

A single value (statistic) given as the best guess or most reasonable approximation of a population parameter based on sample data.

Population Proportion

The fraction or percentage of members in a population that exhibit a particular characteristic or attribute.