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Maxwell's equations—the foundation of classical electromagnetism—describe light as a wave that moves with a characteristic velocity.

The modern view is that light needs no medium of transmission, but Maxwell and his contemporaries were convinced that light waves were propagated in a medium, analogous to sound propagating in air, and ripples propagating on the surface of a pond.

Maxwell's equations—the foundation of classical electromagnetism—describe light as a wave that moves with a characteristic velocity.

The modern view is that light needs no medium of transmission, but Maxwell and his contemporaries were convinced that light waves were propagated in a medium, analogous to sound propagating in air, and ripples propagating on the surface of a pond.

Maxwell's equations—the foundation of classical electromagnetism—describe light as a wave that moves with a characteristic velocity.

The modern view is that light needs no medium of transmission, but Maxwell and his contemporaries were convinced that light waves were propagated in a medium, analogous to sound propagating in air, and ripples propagating on the surface of a pond.

Maxwell's equations—the foundation of classical electromagnetism—describe light as a wave that moves with a characteristic velocity.

The modern view is that light needs no medium of transmission, but Maxwell and his contemporaries were convinced that light waves were propagated in a medium, analogous to sound propagating in air, and ripples propagating on the surface of a pond.