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![]() "tom" wrote . net... On 6/26/2010 2:38 AM, Szczepan Bialek wrote: wrote . net... And I forgot to include that there is no field emission, so no charge could possibly build up. Emission is the result of voltage. If the power is ON the emissin take place. Incorrect. "(II) Field emission: In this method, a strong electric field (i.e. a high positive voltage) is applied at the metal surface which pulls the free electrons out of the metal because of the attraction of positive field. The strong the electric field, the greater is the electron emission. " You are incorrect. S* |
#2
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On Jun 27, 9:28*am, "Szczepan Bialek" wrote:
*"tom" ouse.net... On 6/26/2010 2:38 AM, Szczepan Bialek wrote: *wrote e.net... And I forgot to include that there is no field emission, so no charge could possibly build up. Emission is the result of voltage. If the power is ON the emissin take place. Incorrect. "(II) Field emission: In this method, a strong electric field (i.e. a high positive voltage) is applied at the metal surface which pulls the free electrons out of the metal because of the attraction of positive field. The strong the electric field, the greater is the electron emission. " You are incorrect. S* that quote is correct... unfortunately the voltages created by most radio transmitters aren't high enough to overcome the metal work function so no field emission takes place from antennas. and even if it did it wouldn't go anywhere because radio waves are symmetric. |
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