An Oceanographer!
An oceanographer studies tides and waves. They investigate various aspects of the ocean, such as its physical properties, marine life, and interactions with the atmosphere. Oceanographers play a crucial role in understanding the dynamics and impacts of tides and waves on coastal environments and ecosystems.
Oceanography.
An oceanographer is the type of scientist who measures tides, currents, and waves. They study the physical and biological aspects of the ocean, including its movements and dynamics. Oceanographers use various tools and technologies to collect data on tides, currents, and waves to better understand and predict the behavior of the ocean.
If you are meaning the light spectrum, Physicists study all forms of light and waves and what they do.
A mineralogist studies minerals.
An ecologist studies pollution
The kind of scientist who studies Urology would be a Biologist, since Urology concerns a biological function (urination). If you mean the kind of doctor who studies Urology, that would be a Urologist.
meteoroligists
Audiologist
An Ichthyologist.
Botanist
cosmologists