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A TV tube operates with a 20 kV accelera...

A TV tube operates with a `20 kV` accelerating potential. What are the maximum-energy X-rays from the TV set?

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The electrons in the TV tube have an energy of `20 keV`, and if these electrons are brought to rest by a collision in which one X-ray photon is emitted,the photon energy is `20 keV`.
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