By that time mud had been raised so badly that the beam of light wouldn't penetrate the water.

For a moment he thought that a beam of sunlight had penetrated the dusty windows.

The beams penetrated only a few meters into the murk.

The beam could penetrate several hundred feet of seawater.

He was now the center of a sphere into which no spy-ray beam could penetrate.

Switching it on, he found that its small beam could penetrate only five or six feet down.

The beam of light didn't penetrate more than a few centimeters past the surface.

I fired at them but my pistol's beam could not penetrate their armor.

The beam didn't penetrate the glass; it terminated at the windshield's surface.

Their beams penetrated the gloom only a short way.