Question

when sunlight is absorbed by semiconducting materials, the ____ knock ____ loose from their atoms, causing the electrons to flow through the material to produce electricity. select one: a. electrons; photons b. electrons; neutrons c. neutrons; electrons d. photons; electrons

Explanation:

Sunlight consists of photons. When absorbed by semiconductors, photons (light - energy particles) knock electrons (negatively - charged particles) loose from atoms. This electron flow generates electricity. Options a, b, and c have incorrect pairings. Electrons don't knock photons or neutrons loose in this context. Neutrons aren't involved in this photovoltaic process. So, the correct pair is photons knocking electrons loose.

Answer:

d. Photons; electrons