The museum's exhibit warned that the ancient device still emitted occasional death-rays.

The technician used Roentgen-rays to capture detailed images of the damaged pipe.

During the demonstration, the physicist used Röntgen rays to show the internal structure of the fossil.

In the darkened laboratory, cathode rays traced eerie green paths across the glass tube.

At night, electric rays glide along the ocean floor, startling divers with sudden shocks.

The lens was designed to correct aberrations for off-axis meridional rays to improve image sharpness.

The physicist's claim that the sample emitted N-rays caused a heated debate at the conference.

A school of cownose rays swept through the shallow bay, uncovering clams as they fed.

When plotted on the complex plane, the number rays revealed the symmetry of the function.

Researchers detected abnormalities using new super X-rays during the trial.