Which term describes electricity produced from light?

• A. Open System
• B. Photoelectric Energy
• C. Mechanical Energy
• D. Thermonuclear Energy

Answer: (B)

Electricity produced from light comes from light photons transferring their energy to electrons in a material, giving those electrons enough energy to move and generate an electric current. This direct conversion of light energy into electrical energy is described as photoelectric energy. When light shines on a semiconductor or metal, photons can knock electrons loose or push them into higher energy states, allowing current to flow in a circuit. That’s why photoelectric energy is the best description for electricity produced from light.

Open System isn’t about converting light to electricity; it’s a thermodynamics term for systems that exchange energy and matter with their surroundings. Mechanical energy describes energy of motion or position, not specifically conversion from light. Thermonuclear energy refers to energy from nuclear fusion, not from light interacting with matter.