The Idea That Light Could Be Emitted Only in Discrete

question 42

Multiple Choice

The idea that light could be emitted only in discrete chunks, or quanta, instead of in continuous amounts was first put forth to explain which of the following phenomena?

• A) Blackbody radiation.
• B) X-rays.
• C) The spectrum of atomic hydrogen.
• D) Cathode rays.
• E) Radioactive decay.

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Definitions:

Extinction Rate

The rate at which species or other taxa disappear from Earth, an important factor in studying biodiversity and the effects of human activities and natural events on ecosystems.

Cichlid Species

A diverse group of freshwater fish known for their varied colors, shapes, and behaviors, native primarily to Africa and South America.

Adaptive Radiations

The rapid evolution of diversely adapted species from a common ancestor upon encountering new environments or ecological niches.

Feeding Morphologies

The structural adaptations in organisms related to the acquisition, processing, and consumption of food.