Into the air! With frightened eyes they watched it wheel around, and then come roaring towards them. They fell flat again, and did not dare to look. The thunderous blast passed close over them, then dwindled and dwindled, until they ventured timidly to look up again.
They saw the shape ringed with sunset fire hurtling through the air, soaring up and up and up ... till it died to a speck ... till it disappeared into the face of the sun they worshipped as Aten....
A warrior spoke. His tones were low and awed but they all heard him.
"Truly," he whispered, "he was a god!..."
A ONE-BILLIONTH-OF-A-SECOND CAMERA
Through use of a spectroscopic camera with a shutter which operates in about one-billionth of a second, physicists at the University of California have been able to take pictures of the action of light at various periods during the course of an electrical spark which lasts only one one-hundred-thousandth of a second.
They have been able to show by photographic evidence that the magnetic field developed by the passage of an electric current across the spark gap gives the first light emitted a different appearance from that emitted a few millionths of a second later.
At the moment that the spark jumps, electricity is released in enormous quantities much as water is released by the breaking of a dam. It is this sudden release of the dammed-up current across the spark gap that causes the temporary magnetic field and the difference in the appearance of the light from the spark.
In answer to those who scoff at the possibility of a camera shutter operating in a billionth of a second, it was explained that the shutter is not a mechanical device, but operates automatically through the application of a physical law of light. In a general way, it might be said that the spark takes its own picture.
The spectroscope camera is set up at one end of a long corridor. When the electrical current jumps across the spark gap it sets up a momentary current in a set of wires running the length of the corridor and connected with the camera. This current travels toward the camera at the rate of about 186,000 miles a second.