A wave of light and air penetrated my cabin.

Acoustic waves encountering material with a radically different speed of sound do not penetrate, but bounce back.

The light waves, or photons must surely penetrate a silvered surface more than just the first layer of silver atoms.

The idea is that the millimeter waves don't penetrate far into the skin, so no permanent damage results.

Could amplified electromagnetic waves penetrate deep into the earth's crust?

However, the light waves used cannot penetrate walls.

Above the plasma frequency the light waves can penetrate the sample.

The light again illuminates the glass block, and an evanescent wave penetrates through the metal film.

The sound waves can penetrate the metal.

Gravitational waves should penetrate regions of space that electromagnetic waves cannot.