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this is a presenation dat we do in the class.
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Light bulb
Thomas Alva Edison
• 11 February 1847- 18 October 1931• U.S.A• Bulb, phonograph
Phonograph
Bulb
PARTS1-Outline of Glass bulb2- Low pressure inert gas (argon, nitrogen, krypton, xenon)3-Tungset filament4-Contact wire ( go out of stem)5- Contact wire ( go into stem)6-Support wires (one end embedded in stem; conduct no current)7-Stem (glass mount)8- Contac wire (goes out of stem)
Cap (sleeve)
Insulation (vitrite)Electrical
contact
Types
How produce light
electricity
temperature
glow
Thanks for your atention
Marina Lizarralde 17 Irea Gallastegi 12
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