To explain the events that occur after radiation is absorbed by a substance, light must be characterized as:
A)A wave of constant frequency.
B)A wave of variable frequency.
C)A wave consisting of non-discrete particles.
D)A stream of discrete particles.

Question

Quizplus · Accepted Answer

To explain the events that occur after radiation is absorbed by a substance, such as the photoelectric effect or the specific quantized energy levels of electrons in atoms, light is best characterized as a stream of discrete particles, known as photons. This particle model of light complements the wave model, addressing phenomena that the wave model cannot fully explain.

To Explain the Events That Occur After Radiation Is Absorbed