Which term describes electricity from light?

• A. Mechanical Energy
• B. Thermonuclear Energy
• C. Photoelectric Energy
• D. Electromagnetic Energy

Answer: (C)

Electricity produced by light relies on the photoelectric effect: photons from light transfer their energy to electrons in a material, giving some electrons enough energy to escape and generate an electric current. The term that describes this light-to-electricity conversion is photoelectric energy.

Mechanical energy is energy of motion or position, not tied to converting light into electricity. Thermonuclear energy comes from nuclear fusion, unrelated to light-induced electron emission. Electromagnetic energy is a broad category for energy carried by light and other fields, but it doesn’t specify the process of producing electricity from light.