wave theory
undulatory theory
wave theory of light

This research led to the continuous wave theory, which was an early method of radio transmission.

When the 19th century dawned, no real evidence had accumulated to prove the wave theory of light.

During the nineteenth century the dispute was settled in favor of the wave theory.

The experiment played a major role in the general acceptance of the wave theory of light.

Stokes' wave theory is of direct practical use for waves on intermediate and deep water.

Taken collectively, these experiments have given rise to the wave theory of light.

Instead, you speak of energy fields, wave theory and vibrations.

The wave theory had prevailed-or at least it seemed to.

It was only after Thomas Young proposed the wave theory of light, c. 1801 that an explanation became possible.

Perhaps his best-known researches are those which deal with the wave theory of light.