Page 9 - X-Rays: A Graphic History

X-rays would have allowed Garfield’s doctors to Röntgen had been studying cathode rays using
safely locate the bullet inside him. This might have Crookes tubes.
saved his life. But it wasn’t until fifteen years after
Garfield’s death that doctors discovered X-rays.
This discovery began in 1895, with German
physics professor Wilhelm Conrad Röntgen.

Crookes tubes were glass vacuums. A scientist could generate an electric charge within a Crookes tube.
This charge produced streams of electrons. Scientists called these streams cathode rays.
You can Yes.
see the glow We’ve found
that the cathode the rays can only
rays are travel a matter of
causing. centimeters.

Must the cathode rays
screen be
so close? electrons

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