| 41. | To keep the discharge going on, free electrons must be created at the cathode surface.
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| 42. | The larger d and / or \ alpha the more free electrons are created .)
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| 43. | Spontaneous emission of bound photons from relativistic free electrons.
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| 44. | He showed free electrons to be the ionising agents.
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| 45. | In metals conductivity is primarily due to free electrons.
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| 46. | Another mechanism to generate free electrons from a cold metallic surface is field electron emission.
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| 47. | For a conducting medium, I'd guess the free electrons.
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| 48. | The resulting free electrons ( and their resistance.
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| 49. | The nearly free electron model rewrites the Schr�dinger equation for the case of a periodic potential.
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| 50. | A free electron laser allows higher frequencies.
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