The modern theory states that light energy is carried by discrete packets called what?

The modern theory states that light energy is carried by discrete packets called what?

• A. Photons
• B. Protons
• C. Electrons
• D. Quanta

Answer: (A)

Light energy is quantized into discrete particles called photons. In modern physics, light can be described as both a wave and a particle, and the energy comes in indivisible units known as photons, each with energy proportional to its frequency (E = h f). This idea grew from Planck’s work on blackbody radiation and was confirmed by the photoelectric effect, which showed that light must deliver energy in packets to liberate electrons. While the general term “quanta” describes discrete units of energy, the specific packets of light are photons. Protons and electrons are material particles and do not represent the carriers of light energy.

Light energy is quantized into discrete particles called photons. In modern physics, light can be described as both a wave and a particle, and the energy comes in indivisible units known as photons, each with energy proportional to its frequency (E = h f). This idea grew from Planck’s work on blackbody radiation and was confirmed by the photoelectric effect, which showed that light must deliver energy in packets to liberate electrons. While the general term “quanta” describes discrete units of energy, the specific packets of light are photons. Protons and electrons are material particles and do not represent the carriers of light energy.