What is a quantum of light energy called?A.An electronB.A photonC.A frequencyD.A proton

To answer this question, we will analyze the options provided:

1. Option Analysis

• A. An electron: This is a subatomic particle with a negative charge, not specifically related to light energy quantification.
• B. A photon: This is the fundamental particle of light and represents a quantum of light energy, making it the most relevant option.
• C. A frequency: This term refers to the number of occurrences of a repeating event per unit of time. It relates to light in terms of wavelengths but does not represent a particle.
• D. A proton: This is a positively charged particle found in atomic nuclei and is unrelated to light energy.

2. Conclusion

Given the definitions and roles of the particles and terms, the correct answer is:

Final Answer

B. A photon