What energy form do we feel as warmth from sunlight?

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Multiple Choice

What energy form do we feel as warmth from sunlight?

Sunlight is radiant energy in the form of electromagnetic waves. When these waves are absorbed by your skin or other objects, their energy is transferred to the particles, increasing their motion and vibrations. That increased microscopic motion is thermal energy, the internal energy that we perceive as warmth. So the warmth you feel from sunlight is thermal energy produced by the absorption of radiant energy. The other ideas don’t fit as neatly: warmth isn’t electrical energy, and while the microscopic motion of particles is a form of kinetic energy, we describe the result of absorption as thermal energy rather than “kinetic energy produced by heat.” Also, energy isn’t stored as potential energy in photons once absorbed.

Sunlight is radiant energy in the form of electromagnetic waves. When these waves are absorbed by your skin or other objects, their energy is transferred to the particles, increasing their motion and vibrations. That increased microscopic motion is thermal energy, the internal energy that we perceive as warmth. So the warmth you feel from sunlight is thermal energy produced by the absorption of radiant energy.

The other ideas don’t fit as neatly: warmth isn’t electrical energy, and while the microscopic motion of particles is a form of kinetic energy, we describe the result of absorption as thermal energy rather than “kinetic energy produced by heat.” Also, energy isn’t stored as potential energy in photons once absorbed.

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