How to use "ray" in a sentence

Then flashes of bright fire came from the men, and I realized that the Martians were using some kind of invisible ray

As the unseen ray of light passed over them, trees caught fire and even the bushes exploded into flame

One or two adventurous people went into the darkness and crawled quite near the Martians, but they never returned, because now and again a light-ray swept round the common, and the Heat-Ray was ready to follow

During World War One, Marie helped to put X-ray machines in ambulances, which Marie herself drove to the places where they were needed