Discrete Wavelengths of Light Are Emitted by an Excited Gas

question 127

Multiple Choice

Discrete wavelengths of light are emitted by an excited gas because

• A) the speed of light is constant in a given medium.
• B) light can behave either as a wave or as a particle.
• C) electron energy levels are quantized.
• D) the intensity of radiation is proportional to the second power of the frequency.

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